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.

Motor Mount question.

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Old 08-04-2010, 06:54 PM
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Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Motor Mount question.

This is a simple one, and probably pretty obvious, but..

Since the LT1 uses the SBC upper clamshell mounts to bolt into a 3rd gen, is it safe to assume that I can buy solid lower motor mounts for an SBC, and they will work fine with the LT1?

Here's an example:
http://www.summitracing.com/parts/TRD-9632/

Thanks!
Old 08-04-2010, 08:54 PM
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Car: 91 Trans Am
Engine: LSA
Transmission: T56 AWD
Axle/Gears: 8.8 4.10
Re: Motor Mount question.

Yes, but remember the pass side LT1 mount on the block is different and wont work for your swap. Use a SBC mount
Old 08-04-2010, 09:44 PM
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Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Motor Mount question.

I am keeping the mounts off of my 350sb, and putting them on the LT1.

Thank you for the info.

Old 08-05-2010, 10:55 AM
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Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: Motor Mount question.

I used my factory 305 TPI SBC mounts for the LT1 and ordered solid motor mounts from UMI I belive and the driver side bolted up just fine but the passenger side was off by like 1/8" just enough to not work so we have to modify the solid motor mount and finally got things right but was a pain in the ***. Just an FYI. It could have just been a problem with the UMI solid mount.
Old 08-05-2010, 11:36 AM
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Car: 83 Trans Am / 96 Jeep XJ
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Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Motor Mount question.

I hope that doesnt happen, I figure I should get new mounts anyways, so why not get solid, ya know?

Thanks for the headsup.
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