98-LS1

iTrader: (4)

I can't remember what CC's these LG4 305 heads are, if I remember correctly they make the compression ratio too high on a 350 correct? I kinda figured the small combustion chamber and valves would hurt the HP more so than making power. What's the story on running 305 heads on a 350?

My01SSCamaro

iTrader: (1)

im almost postive they are 58cc combustion chambers the compression would prob be around 10.0 with the factory style dished piston and around 10.5 with a flat top, Those heads suck i wouldnt run them on anything other than an 305, you would be better off buying some 350 heads and sacraficing some compression get atleast 1.94 intakes and 1.50 exhaust i know the lg4 heads are tinny, if you had the money you can pick up a set of vortec heads for 500 new and a used set for around 200, but you will then need a vortec style intake. hope this helps

1997bird

iTrader: (2)

They are 58 cc heads that might be able to feed your 350 up to 3500 rpm before the small cc int runners run out of steam. I would agree with the vortec heads or some aftermarket heads. They are redesigned for bigger int runners, more efficient combution chambers, and better flow. They are a easy 30-70 HP bolt on. I have a wholesale account were I can get the heads much cheaper than mail order. I can get the vortec chevy heads with screw in studs bare for $215 each plus shipping or assembled with high quality valves and springs for $315 plus shipping(I will customize your valve springs to match your cam). I can also get some good deals on the Dart Iron Eagle Platinum heads. PM me if I can help you out.