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Old 03-14-2018, 07:27 AM   #951
mcbassin
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Re: 1969 C10 SWB - Big Block project

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Originally Posted by NoNeck View Post
What do you guys think of "7 Year Itch" for the name of Chad's truck? We started on it almost 7 years to the day that it was finished!

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The truck looks great!
Cool name too
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Old 03-14-2018, 08:44 AM   #952
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Re: 1969 C10 SWB - Big Block project

Truck is beautiful and I like the name as well!
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Old 03-14-2018, 11:06 AM   #953
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Re: 1969 C10 SWB - Big Block project

I like the name too.
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Old 03-19-2018, 01:14 PM   #954
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Re: 1969 C10 SWB - Big Block project

Just checking in, Pop and I have been working through a bit of a problem with the 68. 2-3 miles on a test drive and all 4 rotors were smoking they were so hot. Bad brake smell, etc. It wasn't a pretty sight. The truck felt like it was loading up on timing, cracking and popping a bit (more on this in a sec) and wouldn't shift to third. It was turning 4k+ rpm going maybe 20mph.

We found we had the clevis and pin on the pedal a little too far out. Pop dropped the steering column back down and we adjusted the pin. When you let your foot all the way off the brake it should have 1/2 or so "pull off" so it pulls the push rod off the MC. Ours was holding pressure (quite a bit actually) on the pedal. Basically we were driving with our foot on the brakes.

When we adjusted it back off, man the truck is like night and day difference. It will idle and just slow roll in gear doing that nasty choppy idle. It sounds really good. It's a different truck without the brakes on.

We have an HEI in this truck. What are your thoughts on running both mechanical and vacuum advance? Should we block one, maybe go to an MSD, etc? The cam is pretty big. It's the 60203 (I think?) Voodoo cam. Would you swap the distributor? On idle it's nice.. slow acceleration it's nice but it concerns me at the 4k rpm range it seems to have been breaking up a little. Was that just because it was working extra hard with the brakes on?

Something else to consider I have 2.5" tailpipe. The mufflers are Magnaflow, 4" x 14" long tube type. They're not very big at all. Could the cracking be coming from too much back pressure? Are the mufflers really big enough for the motor? Dad and I are swapping them out for some bigger ovals I guess we'll see. I just wanted to get some input on it.

Thanks
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Old 03-19-2018, 06:21 PM   #955
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Re: 1969 C10 SWB - Big Block project

Unless you have a strip only vehicle, you can benefit from vacuum advance, better mileage is not something I would give up. You do NOT have to use vacuum advance, though....

What power valve is in that thing, jets? Total timing. An HEI will work OK, till about 6200, but could use some massaging sometimes.

Tell us about your fuel system, line size, pump, all the way to the tank.........
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Old 03-26-2018, 02:33 PM   #956
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Re: 1969 C10 SWB - Big Block project

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What power valve is in that thing, jets? Total timing.
The carb is a Holley 3310 with 750 cfm. It has been blueprinted for the engine and uses 73 Jets. The Power Valve is 4.5" with a blow out preventer ball added.

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Tell us about your fuel system, line size, pump, all the way to the tank.........
The truck uses a '69 Camaro tank mounted in the rear with 3/8" metal fuel lines throughout. A fuel pressure regulator is also used and is set at 5.5 psi. The fuel pump is a mechanical AC Delco.
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Old 03-26-2018, 02:38 PM   #957
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Re: 1969 C10 SWB - Big Block project

We got a 4 wheel alignment on the truck today. It drives much nicer now.

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Old 03-26-2018, 03:13 PM   #958
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Re: 1969 C10 SWB - Big Block project

Do you have any verification the the 5.5 psi is holding at the carb?
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Old 03-28-2018, 01:15 AM   #959
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Re: 1969 C10 SWB - Big Block project

I just discovered this build thread after spotting your posts on windshield install tips (grrr) and driveline vibration (grrr). My wife kept asking me what I was spending so much time reading about on the laptop tonight. 39 pages makes for a long read, but I enjoyed it thoroughly. Beautiful color, interior and wheel combination BTW-loved the wood bed floor too. Now that your Dad has helped you finish this project, can you send him to West TN to help me sort out a few odds and ends on my 1970?
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Old 04-13-2018, 07:35 AM   #960
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Re: 1969 C10 SWB - Big Block project

I would like to know how you did the license plate flip down in the back....
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Old 04-13-2018, 09:50 AM   #961
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Re: 1969 C10 SWB - Big Block project

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I would like to know how you did the license plate flip down in the back....
It's likely an old muscle car license plate bracket. Any car that had the fuel filler behind the license plate would have one.
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Old 04-13-2018, 01:09 PM   #962
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Re: 1969 C10 SWB - Big Block project

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Do you have any verification the the 5.5 psi is holding at the carb?
We installed an inline gauge to verify the psi and it actually read 5.9. It is now backed down to 5 psi and reads a constant 5.5 psi. Thanks for the suggestion.

Quote:
Now that your Dad has helped you finish this project, can you send him to West TN...
Diggerbob, Chad's Dad here. I am glad you enjoyed the build on this truck. Now that the truck is almost finished my wife has this "Honey-Do" list a mile long. I imagine I will be busy for the rest of the year! :-)
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Old 04-13-2018, 01:43 PM   #963
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Re: 1969 C10 SWB - Big Block project

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I would like to know how you did the license plate flip down in the back....
Duane, I opened up the stock license plate bracket to access the filler neck with a metal cut off wheel. Then I located a flip down license plate holder from a 1984 Monte Carlo. After drilling a couple of mounting holes I bolted it up and it works great. Any GM license plate holder from '78-'87 Grand Prixs, Monte Carlos, Buick Skylark, etc. should work.
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Old 04-15-2018, 01:20 PM   #964
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Re: 1969 C10 SWB - Big Block project

Hey guys, Kim & I had a blast hanging out this weekend! Truck looks & sounds AMAZING!!! Looking forward to GoodGuys!
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Old 04-16-2018, 02:17 PM   #965
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Re: 1969 C10 SWB - Big Block project

It was a lot of fun Ed. Sorry I couldn't get to the Coker show, but these old legs just wouldn't cooperate. You guys are welcome anytime! Tell Kim we said hello.

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