81 NASCAR Turbo Trans Am

81 Turbo Trans Am NASCAR addition LS3 Swap Holley Terminator X Max 550-918

i bought my Trans Am back in 1985... I drove it for about 6 years... drove the brakes into the ground... as a teen, I couldn’t really afford to repair the car at the time. I ended up storing it in my parents garage.... where it sat for over 33 years. I decided to pull it out in the fall of 2019. After repairs to the braking system... I had to pull the engine due to a bad oil leak... rear cam seal ... I decided to do a LS swap after anticipating I may need to rebuild a 200 hp engine .... I decided a LS3 and 4 speed automatic would be a nice replacement.... almost 3 times the horse power and 200LB lighter in weight .

this is what I’ve done so far.

2007 L92 candidate 6.2L aluminum block rectangle port LS3 heads. I Had the cylinders bored out to 4.070 , I purchased and installed the Summit Racing Pro LS 416 Rotating assembly. The assembly came with summit Racing’s forged aluminum pistons, Forged H Beam Rods and a 4 inch stroke Forged steel crankshaft. I had the rotating assembly balanced. The VVT was deleted and replaced with a BTR Stage 2 NA Cam for maximum streetability

, I went with the 4L70E transmission and a 3000 rpm stall converter.....

102mm throttle body

BTR NA stage 2 cam

BTR valve springs

7.40 hardened pushrods

60LB Bosch injectors

Holley sniper fuel rails

double roller 4 poll timing kit

Melling high pressure oil pump

shorty 1 7/8 stainless steel headers

duel exhaust 2 1/2 inch with X pipe.