What are the best heads and cam package for a 85 305tpi Trans am? I'm wanting the most horsepower i can get.Plan on porting plenum,intake manifold, and runners. Also have plans for a thermomaster chip.

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85 305tpi Tans am
flowmaster exaust
K&N air filter, 4:11 rear gears

 

I'm one of the few on here that like the 305.

I will always run the stock 416 heads on my 305, and the LPE hydraulic roller cam listed below.

I say port your heads and set them up with screw-in studs & guideplates so you can run higher ratio rockers.
If you have a lot of money, get them extrude honed as far as possible. The 305 heads are almost foolproof. You are unlikely to do any mods to them that hurt power.

 

I am about to do the same thing, Im going to put in a cam probably this weekend except Im stuck between the crane compu 2030 and 2040, touch decision, also im porting my intake manifold putting in a cooler thermostate and I hope to be back on the road by monday.

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1985 IROC-Z, nuff said :P

 

What reasons do you have to like the 305? Maybe you like to be the underdog? I mean, even parts cost the same or more than a 350 or bigger. Maybe you can enlighten me.

 

its when you beat someone and they say "what u got" and you say "305 tuned port" and see the reaction on their face

 

lol! I tell them my 383 is a 305 just for that look

 

maybe its just me but i really like the sound of a 305 much more than a 350... I guess thats a silly reason though

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91 z28 lb9 5 speed - hooker 1 5/8 headers - high flow cat- full 3 inch exhaust - home made ram air - tpis airfoil - dual chamber flowmaster - Stage 2 Jet Chip and 160 stat - 8 mm Msd plug wires - 55,000 v hypertech coil/rotor/distrib. cap - Mac. White face gauges - lots of sound system crap...