LSX 454 and a 6L90 in a 72 k5 blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luba · 09-09-2010, 07:05 AM

I am planning on doing a frame off resto of my 72 Blazer. I would like to run a mast motorsports LSX 454 fuel injected small block (700 hp) and a newer 6 speed tranny and put it into my k5. I already have a dana 60 front, 14 bolt rear 4.56 gears detroit locker in the rear, maybe an ARB in the front. I know the mast ecm will control the 6l90. I plan on running around 37" tires and want to be able to drive this thing anywhere. I plan on fully boxing the frame and building a cage tied to the frame. Just wondering what kind of power levels the 6 speed auto can handle. Also wondering if I can bolt my np205 t-case to it, or if I should get a different one. Any advice?

STOCKISH · 09-10-2010, 07:18 AM

Try advance adapters for the np205 to 6l90 adapter. Hopefully they can help you out. Sounds like a freakin awesome project!

VA72C10 · 09-10-2010, 07:23 AM

Sweet build!

Luba · 09-10-2010, 07:55 AM

Nothing is set in stone and it will take a while to complete. But this is the combo I would like to run.

softballnrd27 · 09-17-2010, 07:51 AM

If you are going to put that much $$$ into the truck why not scrap the 205 and go with an Atlas TC? I had one in my Jeep and they are awesome!! Absolutely bulletproof!

Luba · 09-17-2010, 08:31 AM

How much is an Atlas T-case? What are the benefits?

Luba · 09-17-2010, 08:40 AM

Wow just looked them up--$2300 or so. I can get a lot of 205's for that. This isn't going to be a mudder or rock crawler, and the 205 is pretty strong.

au03z71 · 09-17-2010, 08:48 AM

LSx 454...drool. Do want!

softballnrd27 · 09-17-2010, 09:59 PM

Oh ok, then no reason to get an atlas.

MONTEZ · 09-21-2010, 11:48 AM

I work for MAST part tim in the evenings. I used to machine blocks for them but now I help out with the dyno and dressing out the engine before they ship. I'm no expert, but if you have any questions, I can talk to the guy there and get back to you. But unless you just have tons of money to burn, I would consider just running a l92 or ls3. They have some setups that start around 525 and go up from there. Deffinatley not as much WOW factor, but they are a lot cheaper.

09-09-2010, 07:05 AM	#1
Luba Registered User Join Date: Sep 2005 Location: Bay City, MI Posts: 128	LSX 454 and a 6L90 in a 72 k5 blazer I am planning on doing a frame off resto of my 72 Blazer. I would like to run a mast motorsports LSX 454 fuel injected small block (700 hp) and a newer 6 speed tranny and put it into my k5. I already have a dana 60 front, 14 bolt rear 4.56 gears detroit locker in the rear, maybe an ARB in the front. I know the mast ecm will control the 6l90. I plan on running around 37" tires and want to be able to drive this thing anywhere. I plan on fully boxing the frame and building a cage tied to the frame. Just wondering what kind of power levels the 6 speed auto can handle. Also wondering if I can bolt my np205 t-case to it, or if I should get a different one. Any advice?

09-10-2010, 07:18 AM	#2
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: LSX 454 and a 6L90 in a 72 k5 blazer Try advance adapters for the np205 to 6l90 adapter. Hopefully they can help you out. Sounds like a freakin awesome project! __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with.

09-10-2010, 07:23 AM	#3
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,269	Re: LSX 454 and a 6L90 in a 72 k5 blazer Sweet build! __________________ Looking for a 67-72 swb or blazer project in or around VA.

09-10-2010, 07:55 AM	#4
Luba Registered User Join Date: Sep 2005 Location: Bay City, MI Posts: 128	Re: LSX 454 and a 6L90 in a 72 k5 blazer Nothing is set in stone and it will take a while to complete. But this is the combo I would like to run.

09-17-2010, 07:51 AM	#5
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: LSX 454 and a 6L90 in a 72 k5 blazer If you are going to put that much $$$ into the truck why not scrap the 205 and go with an Atlas TC? I had one in my Jeep and they are awesome!! Absolutely bulletproof! __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

09-17-2010, 08:31 AM	#6
Luba Registered User Join Date: Sep 2005 Location: Bay City, MI Posts: 128	Re: LSX 454 and a 6L90 in a 72 k5 blazer How much is an Atlas T-case? What are the benefits?

09-17-2010, 08:40 AM	#7
Luba Registered User Join Date: Sep 2005 Location: Bay City, MI Posts: 128	Re: LSX 454 and a 6L90 in a 72 k5 blazer Wow just looked them up--$2300 or so. I can get a lot of 205's for that. This isn't going to be a mudder or rock crawler, and the 205 is pretty strong.

09-17-2010, 08:48 AM	#8
au03z71 Registered User Join Date: Jul 2006 Location: alabama Posts: 647	Re: LSX 454 and a 6L90 in a 72 k5 blazer LSx 454...drool. Do want!

09-17-2010, 09:59 PM	#9
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: LSX 454 and a 6L90 in a 72 k5 blazer Oh ok, then no reason to get an atlas. __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

09-21-2010, 11:48 AM	#10
MONTEZ Registered User Join Date: May 2010 Location: Nacogdoches,Texas Posts: 330	Re: LSX 454 and a 6L90 in a 72 k5 blazer I work for MAST part tim in the evenings. I used to machine blocks for them but now I help out with the dyno and dressing out the engine before they ship. I'm no expert, but if you have any questions, I can talk to the guy there and get back to you. But unless you just have tons of money to burn, I would consider just running a l92 or ls3. They have some setups that start around 525 and go up from there. Deffinatley not as much WOW factor, but they are a lot cheaper. __________________ Smoke Tires, not Drugs



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