1991 RS LS-3 headed 6.0L swap.
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Joined: Sep 2006
Posts: 962
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From: Canada
Car: 1979 Malibu
Engine: Blown LSx
Transmission: T56 Magnum
Axle/Gears: 9"/wavetrac/35's/3.70
1991 RS LS-3 headed 6.0L swap.
Just posting a few pics for a buddy, I built the engine for him, Its a 6.0L, 4.065" bore with diamond pistons, Oliver billet 6.125" rods, 10.4:1 CR, SLP oil pump, Comp billet timing set, cam is a 285LRR-HR113, .621/.624 lift, 235/251 duration @ 0.050" and a 113 LSA. Comp short travel lifters, Ported LS-3 heads, Yella Terra 1.7 ratio shaft mounted rockers, Fast Intake, throttle body and fuel rails, LS-3 take off coils. Hawks CAI, stainless headers, fuel line/regulator kit. Spohn tubular k-member, a-arms and motor mounts.
The spohn motor mounts fit like a bag of sh*t. Literally these things are fricken horrible, and its seems to be a common problem aswell. We could always get one side in but not both, some tried suggesting leaving the bolts loose. Didnt work, so we tried a 3/8" bolt in a 7/16" hole, didnt work. Everyone said slot the mount. Thats when we decided to just cut up the passenger side motor mount, put the tranny in it, level the engine and re-weld the mount almost 1" higher. Last time we use a spohn product on anything.
Anyways... engough complaining, the engine is in and sits level, headers fit nice, now for some pics...



The spohn motor mounts fit like a bag of sh*t. Literally these things are fricken horrible, and its seems to be a common problem aswell. We could always get one side in but not both, some tried suggesting leaving the bolts loose. Didnt work, so we tried a 3/8" bolt in a 7/16" hole, didnt work. Everyone said slot the mount. Thats when we decided to just cut up the passenger side motor mount, put the tranny in it, level the engine and re-weld the mount almost 1" higher. Last time we use a spohn product on anything.
Anyways... engough complaining, the engine is in and sits level, headers fit nice, now for some pics...



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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 1991 RS LS-3 headed 6.0L swap.
seriously nice setup so far. like the valve covers too. I'm doing a similar motor (L92 heads / LQ9 block), but you've taken it far beyond my level. Look forward to some more photos and progress!
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Joined: Aug 2005
Posts: 326
Likes: 1
From: edmonton alberta canada
Car: 91 rs,1 92 rs,92 b4c/1le
Engine: 5.0tbi,5.7 tune port/5.0tpi
Transmission: 5spdx2 and t56
Axle/Gears: 3.08,3.73,3.42
Re: 1991 RS LS-3 headed 6.0L swap.
charlie thanks for posting my pics
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Joined: Nov 2001
Posts: 2,266
Likes: 37
From: Canada,Ont
Car: 1987 TransAm Ttop
Engine: 2005 LQ4
Transmission: Ls1 T56
Axle/Gears: 3:54
Re: 1991 RS LS-3 headed 6.0L swap.
wow that is one clean looking motor,every nut/bolt brand new lol.I think its too pretty and I have to take it off your hands and give you my cammed lq4
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iTrader: (4)
Joined: Aug 2005
Posts: 326
Likes: 1
From: edmonton alberta canada
Car: 91 rs,1 92 rs,92 b4c/1le
Engine: 5.0tbi,5.7 tune port/5.0tpi
Transmission: 5spdx2 and t56
Axle/Gears: 3.08,3.73,3.42
Re: 1991 RS LS-3 headed 6.0L swap.
i think i will keep this engine,kind of curious of what it will run.just removed the old tpi harness,and i am waiting on pocket to build the new one.
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