i just bought a 86 iroc with 40k miles and i'm looking to do the heads and cam on it. what would be the better choice a stock set of heads redone or a set of sr 305 heads ported and polished. and for cams should i put a roller in it or a flat tappet cam. i'm going to use the stock intake on the motor . ported base and plenum. i'm not looking to make this a race car just a good running street car. thanks for any input

 

The stock casting all nice and hogged out should net you a decent improvement. As far as the cam goes I am still up in the air myself but you will need a flat tappet for and 86 unless you want to pay fro the retrofit lifters. You might want to consider some headers first my hedman lt's netted me three tenths and 2 mph alone.

 

i'm going to do all the bolt on stuff. headers, exhaust,conv.,etc.

 

I don't know if they still offer it, but Summit Racing use to sell a camshaft and computer chip just for '86 TPI engines that was supposedly worth 30-40 horsepower, and i don't think it was that expensive.

 

i heard that ported and polished stock 305 heads are sufficient and will give u nice power, but a couple companies make great, cheap replacements, the most popular being World...

 

i have alum.l98 heads for my 85 305. still waiting for comp cams to get back to me on what cam though.
also have hooker 2460's, and still debating on staying tpi when i really wanna try the lt1 intake.

 

why do u want an lt1 intake? it should take away ur torque advantage of the tpi and lose low end power and get u a little high end power that u dont even need and will never see...IMO