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LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

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Old 11-14-2008, 11:45 AM   #1
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Join Date: Aug 2008
Location: Central Wyoming
Posts: 447
Car: '84 Z28/'82 Z28/'02 C5Z
Engine: 350 cam, boltons/350/cam boltons
Transmission: 700r4/700r4/M6
Axle/Gears: 3.73/3.43/3.43

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6.0L Vortec Lq4

I might be able to get a LQ4 6.0L Vortec motor out of a chevy truck 1999-2004. will it bolt up to a 1991 700r4?
Will it be worth the hassle of swapping the motors and getting all the computerized **** hooked up? (my motor right now is carburated). Or should i just jack the heads off of them?
stock hp rating is 300HP with like 360 ft lbs.
if i got the heads, the required edelbrock RPM intake manifold, and headers, i think i could push 320HP and 350TQ or so. what do you guys think?

Last edited by 10secondhopeful; 11-14-2008 at 12:24 PM.
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Old 11-14-2008, 01:02 PM   #2
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Join Date: Mar 2000
Location: Littleton, CO USA
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 10B-3.73/9"-3.89

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The LQ4 is an LSx Gen III type engine. The heads won't fit a Gen I block. Why they kept using the Vortec name when the engine was completely redesigned is beyond me.

If you do such a swap, carb is, in my personal opinion, a complete bastardization of the engine. But, that's just my opinion (backed up by the fact that it would cost more to make it run with a carb than it would with proper FI).

Moving to the proper forum.

Oh, and read the LSx swap sticky in the top section of this forum.

Last edited by five7kid; 11-14-2008 at 01:05 PM.
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Old 11-14-2008, 01:22 PM   #3
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Join Date: Aug 2008
Location: Central Wyoming
Posts: 447
Car: '84 Z28/'82 Z28/'02 C5Z
Engine: 350 cam, boltons/350/cam boltons
Transmission: 700r4/700r4/M6
Axle/Gears: 3.73/3.43/3.43

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Re: 6.0L Vortec Lq4

okay thanks a million
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Old 11-14-2008, 01:51 PM   #4
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Re: 6.0L Vortec Lq4

Try to get an '01-up engine. There were several hard-to-see improvements.
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Old 11-14-2008, 05:42 PM   #5
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Join Date: Sep 2004
Location: Pensacola Fl.
Posts: 225
Car: racing on jackstands in Pensacola!!
Engine: 6.0 LSx
Transmission: th350
Axle/Gears: moser 9" 4.10's

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Re: 6.0L Vortec Lq4

I know of a 6.0 car here in Pensacola that has a stock bottom end, a decent cam with some mild head work that runs 6.50's on a mild tune with a 100 shot of spray. I do believe that's DEEP in the 10 second range you're seeking. His runs through a th350 and a 9" as well. Mine is right behind him now too. The LS is going in this week. And as far as a carb being a "bastardization", TJ's car knocks down 13mpg or so with a 4.33 gear on drag radials, drives to and from the track and is a great street car. I can only HOPE my hotrod is a good as his. Nothing wrong with a carbed LSx motor at all.
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Old 11-15-2008, 07:41 PM   #6
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Re: 6.0L Vortec Lq4

Get an 01+ LQ4 as it will have the aluminum heads.

The block will fit to your trans, but you need to run a specific flexplate, crank spacer and longer bolts.

Check out this link for parts.
http://www.pacificp.com/forum/viewtopic.php?t=7252

That info was for a 4l60e/65/e/70e, but will also work for your 700r4.

epace
Hog

Last edited by Hog; 11-15-2008 at 08:42 PM.
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Old 11-15-2008, 07:41 PM
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