The Stovebolt Site Forums The Shop Area Engine Shop Cylinder Head comparison

Hey guys, I'm relatively new to teh specifics of the Stovebolts, but I'm on the fast track! I have a 50' Sport Coupe with the glide which has the upgraded 235 splasher. Anyways, I'm in the process of collecting parts for a 62'261 swap. My main question is which cylinder head to go with? Because the 50' head had the big intake valve should I consider it, or since I also have a "848" head should I use it? The "848" has the smaller combustion chamber but would that outweigh the value of the 50' powerglide head?

Your PG head has 15 head bolts and won't fit but you can machine the 848 head to accept the powerglide intake valves which is common in performance builds. Search here for more detailed information:

http://www.inliners.org/

Thanks Curt B.....I've been struggling with all the differences. That's OK though...it gives me the chance to keep the 235 original should I ever need to change back. I'll give inliners a shot...

Curt B.,

Did you ever determine what, if any, is the benefit for using the early Powergide intake valves? There must have been a reason why Chevrolet went back to 1-7/8" intake valves for the Corvette Six and all of the later 235 and 261 engines. It seems that only with a low-lift cam would there be much of an advantage for the larger valves with the siamesed-port flow path to the valves.

Hoyt

Curt B, would it have to do with the compression ratio and cam profile?