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.

LONG TUBE CROSSMEMBER?

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Old Jun 29, 2008 | 03:01 PM
  #1  
Mike Massey's Avatar
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From: jackson miss
LONG TUBE CROSSMEMBER?

I am about to order my swap mounts and like spohns reputation.;but does anyone have any advice or opinions on th long tube t56 crossmembers ive seen? I have thought about running duals with dumps. I omly want to do this once THANKS!!!
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Old Jun 29, 2008 | 04:07 PM
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From: St. Louis
Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies
Re: LONG TUBE CROSSMEMBER?

Only longtube crossmember I know of other then the custom jobs is skultes.

That's what I use with my longtubes. Tranny mount hole was too far forward but I modded it to work.
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Old Jun 29, 2008 | 04:12 PM
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From: 39.84N 105.11W
Car: '89 Trans Am GTA
Engine: WAS 350 - now L92 (alum. 378/6.2L)
Transmission: WAS 700R4, now a built T56
Axle/Gears: 3.27 9-bolt
Re: LONG TUBE CROSSMEMBER?

Best advice I can give you is to search this forum for "exhaust" or "headers". That'll bring up plenty of threads (with pictures!) where people have posted what's worked for them & what hasn't.

The Spohn T-56 crossmember seems to be universally disparaged for being right in the way of where the Hawks headers come out, I'm going to see how it works with the modified Hooker longtubes I'll be using. The Skulte crossmember seems to be pretty decent though...
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Old Jun 29, 2008 | 06:35 PM
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From: jackson miss
Re: LONG TUBE CROSSMEMBER?

thanks guys can you tell me who's motor mounts you used ?
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Old Jun 30, 2008 | 07:53 AM
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Re: LONG TUBE CROSSMEMBER?

I used a Spohn tubular K member and engine mounts and Skulte's long tube crossmember with Hawk's longtubes. I had Zero issues with the tranny crossmember and longtubes, but had to "fiddle" with the tubular K member and engine mounts. Specifically, I ordered the k member with the extra triangle brace mounts (from front of k member to the unibody) and I had interference with both the Alternator and ac compressor. I ended up cutting the extra braces out and spacing up the passenger side motor mount about 1/2". Everything fit after that.

I should have pictures in my swap thread on KYfbodies.org.
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