its an 89 Formula 350 ws6, TPI. all original with 78k miles, i also wanted to know what kind of hp and torque gains are to be expected with a flow master 80 series, new headers, portedt and polished heads with five angle valve job and a better air intake system and a jet chip, or if anyone has tips for good modifications to make to the engine to make it close to 480 hp and 550 torque without sacrificing durability and longevity? Or would a LS Conversion be a better route to follow? if you have a reply to any or all of this please email me at tevin_holt@yahoo.com
I Am also in need of a new front bumper for my firebird, does anyone know of a site or maker of the original bumpers or one similar? or possibly a nice body kit that isn't too radical or low hanging and is actual replacement parts for the bumpers and such, preferably with a place for foglights

 

Probably still be under 300hp at the crank with all that done.

 

yeah I agree with ninetyone, your looking at 300 flywheel horse with those mods. Mods in my sig make power closer to what your looking for 467 FWHP 517 FWTQ

 

It will be hard to get to those numbers with a tpi system.a stock tpi system is pretty restrictive. A stealth ram or intake from tpis would be a nice upgrade.but you would still be limited by the stock heads