Polished Shorty Headers

Polished Shorty Headers

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are these good spec for a 1995 pontiac trans am?

383 stroker
forged crank and rods
LT1 Block bored .60 over
Forged aluminum .60 over pistons
Approximate compression ratio 10.4:1 with a 58.22cc head (60cc now est. 10.3:1)
Aluminum Head Mild Ported & Polished with .202 valves
Larger Throttle Body 52mm to 58mm
aftermarket Injectors
MSD Ignition & Coil
Edelbrock Shorty Headers
Borla Exhaust
nitrous express nos kit
motor was balanced

LT1 292XFI CAM
Gross Valve Lift - (Intake .584)(Exhaust .579)
Duration @ .006 Tappet Lift 292
These specs are for Cam Installed @ 109.0 Intake Center Line
Duration @ .050 - (Intake 242)( Exhaust 248)
Lobe lift - (Intake .3660)(Exhaust .3630)
Lobe Separation (Intake 113.0)
Cam goes to 6700 RPM

373 Rear End Gears
3200 Stall Converter Automatic Transmission
Very Aggressive Shift Kit (Gil Younger)
Front Coilover Suspension
BMR Lower Control Arms

Spec for the track? I'd say you're knocking at 11 seconds in the quarter with traction/tires. A bit harsh for anything remotely called "streetability" though!

I don't particularly like that much overbore, but if your builder was confident in the block and did his homework, you should get some solid reliability out of it.

Regarding the trans, I'm also concerned if the only thing was a shift kit. It'll go a ways to keep things from burning up, but you may be seeing trans problems if you're overly harsh on a stock trans with just a shift kit. Estimating what you're making on motor (and nitrous), I'd also worry about the stock driveshaft, if you retained that.

All that aside, excellent little engine build ya got there!