Usually. It depends on if the airflow characteristics are ideally suited to the application. If nothing else, they are lighter, which means the engine needs less power to move the car.
meaning of double hump
202 heads are double hump and the regular small block has single hump.
YES NO problems
These should be double hump heads. They are very sought after heads.
If you're talking about a stock compression short block that came with 58cc heads, the old 64cc double hump heads would lower the compression ratio and make less hp.
It's hard to say they made different castings on the (double hump) heads but GM claimed from 300hp to 375hp for the 327 depending on the heads you should run the casting numbers to find out exactly what you have
No it did not, That was only in the 1950's - late 60's
350 hp double hump head are high compression ,if you are building it ,then you will have to make sure that squish/quench area is around .040 ,if not ,you will have detonation. Also header will be a requirement to get this HP
yes they will i just put a set of double hump heads on my buddys 94 z 71 and they worked great.
hump it good it will get better hump it good it will get better hump it good it will get better hump it good it will get better hump it good it will get better hump it good it will get better
if it has the double hump heads..more than likely 350hp. If not 250hp
on the front of the head(s) there will be a marking that looks like a M that is filled in and also the oil sender will be in the front.