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Old 07-31-2017, 10:17 PM   #26
Rednwhitec20
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Re: 1971 k20 badmax

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Originally Posted by Dieselwrencher View Post
I'd see if you can find some one to weld them first. How far from Pittsburgh Kansas are you? There's a board member that lives there that could probably weld these for you. What kind of tank are you using? A draw straw is a lot cheaper and can be obtained a lot of places. I use 1/2" ones in all my builds most times.
About an hour and a half. School starts the 21st of august and I will be in fort Scott (about 30 minutes north of Pitt.) If he doesn't get it welded soon enough I'll look into it! I think I'm going to cut the 3/8" line and then drill it to 1/2" and run some stainless 1/2" in its place.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 09-04-2017, 08:54 PM   #27
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Re: 1971 k20 badmax

I've been busy lately with moving down to college and such. I managed to sell my 3/4 ton axles, so now it's time to rebuild the Dana 60 front. Now I can have 4wd too. Intercooler pipes are welded but I failed to take a picture.
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1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 09-04-2017, 11:33 PM   #28
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Re: 1971 k20 badmax

I've been busy lately with moving down to college and such. I managed to sell my 3/4 ton axles, so now it's time to rebuild the Dana 60 front. Now I can have 4wd too. Intercooler pipes are welded but I failed to take a picture.
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1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 09-22-2017, 12:37 AM   #29
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Re: 1971 k20 badmax

Well my truck missed the goal of the carshow. But I took the C20, and still had a good time. 2,123 cars were registered in the show, there were some pretty cool cars and trucks there. Anyways, my axle rebuild is slowly coming along since I am only able to work on it on weekends. My Fass lift pump is mounted and he's doing some plumbing for the fuel. A/C is in the works too.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 09-22-2017, 06:37 PM   #30
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Re: 1971 k20 badmax

I'd say A/C is a must before you start driving it. Other wise you'll be driving it with no AC like me.
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

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Old 09-22-2017, 06:58 PM   #31
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Re: 1971 k20 badmax

Haha. Yeah, I'd probably almost always drive the Camaro since it has pretty good A/C that I'm hooked on now.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 10-02-2017, 08:44 AM   #32
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Re: 1971 k20 badmax

The Dana 60 front has been blown apart and cleaned. We are now painting parts of it and itís about ready to go back together. The AC has been hung in the dash and the holes have been cut!
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 10-15-2017, 09:13 PM   #33
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Re: 1971 k20 badmax

Rollin on one tons
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 10-16-2017, 09:17 AM   #34
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Re: 1971 k20 badmax

Very nice!
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Old 12-02-2017, 03:27 PM   #35
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Re: 1971 k20 badmax

Nice to see a duramax k20 build here! Ive got a couple questions if you don't mind. First was the duramax rear axle wider than the d44 that was in the front? And how little lift could you run with a duramax oil pan? I have a duramax parts truck id love to use to power my 70 k20
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Old 12-02-2017, 04:13 PM   #36
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Re: 1971 k20 badmax

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Nice to see a duramax k20 build here! Ive got a couple questions if you don't mind. First was the duramax rear axle wider than the d44 that was in the front? And how little lift could you run with a duramax oil pan? I have a duramax parts truck id love to use to power my 70 k20
I don't believe it was wider, looked pretty close to the same width. I never measured or anything. It all depends on how you do it. If you put the engine in your 70 frame, you will have to build your own motor mounts and possibly a crossmember. Also to keep it a 4x4 you will HAVE to use a 78-79 ford dana 44 or 60 (60 Recommended) to clear that offset oil pan. My crossmember as you can see is over kill. It can probably be done with 3-4 inches of lift, but there are a lot of factors that can change that. The pumpkin is large, so, how high you set the engine in the frame, how large of a crossmember is used will all determine. You will also probably have to trim the frame rails for the manifolds. The manifolds sit really low on a duramax. Or you could possibly body swap it? Hope that helps
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1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 12-02-2017, 04:37 PM   #37
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Re: 1971 k20 badmax

Yeah it's always a cascade effect when you change anything major like that.I'm guessing you positioned it so the manifolds were an inch or so above the frame rails and moved it forward enough for the heads and turbo to clear the firewall?
Also no body lift right?
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Old 12-02-2017, 05:05 PM   #38
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Re: 1971 k20 badmax

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Yeah it's always a cascade effect when you change anything major like that.I'm guessing you positioned it so the manifolds were an inch or so above the frame rails and moved it forward enough for the heads and turbo to clear the firewall?
Also no body lift right?
Manifolds arenít all the way above the rail, not possible without a body lift or maybe a cowl hood. There is some clearance in the firewall, but not a lot. No body lift, I hate body lifts.
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1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 02-18-2018, 12:26 PM   #39
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Re: 1971 k20 badmax

Sorry my thread has been dead lately. Been super busy between work and school. The wiring is pretty much done, and we tried to start it. We have been running into some problems with it throwing codes, so once that is figured out maybe she'll start. First we threw a cam pos code, and now we are fighting a throttle pos sensor code, which seems correct as we have raw fuel dripping out of the exhaust. It is also possible that I have an injector leaking off.. I also threw an 8 inch lift on for clearance.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 02-22-2018, 11:21 PM   #40
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Re: 1971 k20 badmax

It's always something. Good luck with it and keep at it!
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1976 K30 CC SWB Build Thread

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Old 02-23-2018, 09:20 AM   #41
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Re: 1971 k20 badmax

what are you using for gauges?
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Old 03-14-2019, 09:05 PM   #42
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Re: 1971 k20 badmax

HUGE UPDATE!!
I completely forgot I had started this thread and will be checking the site more often now! Now about the truck. Iíve put about 500 miles on it and Iím still working out the bugs. Iím on my 3rd PS box because of leaks and had to switch it to 2wd for crossover steering. It did great on my 75 Mile one way trip to school. I finally found the exact wheel and tire setup that Iíve always wanted and this truck looks mean, even in primer. Iíve also been messing with the trans cooler trying to get it in the proper location for air.
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Old 03-14-2019, 09:09 PM   #43
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Re: 1971 k20 badmax

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what are you using for gauges?
I am using Dakota Digital VHX gauges with I believe is their BIM. The gauges are nice and can show a lot of info, they run off the OBDII
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1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 03-19-2019, 01:06 PM   #44
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Re: 1971 k20 badmax

Very cool project! I'm not normally a fan of the lifted with big tire look but somehow you found a sweet spot of the right amount of rim, tire and stance and it looks really good! Aggressive yet tasteful if that makes sense
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Old 03-19-2019, 01:46 PM   #45
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Re: 1971 k20 badmax

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Originally Posted by Vintage Windmills View Post
Very cool project! I'm not normally a fan of the lifted with big tire look but somehow you found a sweet spot of the right amount of rim, tire and stance and it looks really good! Aggressive yet tasteful if that makes sense
I originally didnít plan on it being so tall but the crossmember for the duramax was large so it kinda forced me to for clearance. I appreciate the kind words. I absolutely love the set up myself.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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Old 03-21-2019, 09:43 PM   #46
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Re: 1971 k20 badmax

Very awesome that you've got it together and have been working out the bugs! The wheels and tires look great on it. Have any under hood pics of it?
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1976 K30 CC SWB Build Thread

Tired of spark plugs? Check this out.
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Old 03-22-2019, 08:46 PM   #47
Rednwhitec20
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Re: 1971 k20 badmax

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Originally Posted by Dieselwrencher View Post
Very awesome that you've got it together and have been working out the bugs! The wheels and tires look great on it. Have any under hood pics of it?
Thank you very much! And no new pictures of the bay, but I need to get some! I believe I have a boost leak on it🤔 but not sure yet.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
K20 Build
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Old 03-22-2019, 09:27 PM   #48
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Re: 1971 k20 badmax

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Originally Posted by Dieselwrencher View Post
Very awesome that you've got it together and have been working out the bugs! The wheels and tires look great on it. Have any under hood pics of it?
Thank you very much! And no new pictures of the bay, but I need to get some! I believe I have a boost leak on it🤔 but not sure yet.
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1971 C20 Daily, Built 350/700R4
1971 K20 Project, LLY Duramax, 5 speed Allison, and 8 in lift on 37x13.50s
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