Originally Posted by '92BigBronco
I'm no where near an expert.
Heads for a 351W will not bolt on and as far as I know, only the 351C has 4V heads available.
there are 4V heads on alot of 351w's .
yes everyones opinion on the heads vary's depending on what they are looking to get out of them.
i have replaced my set of 4V heads with a set of aftermarket heads that flowed 2 1/2 times more than the 4V before i ported them. (go figure)
the 4V heads will work fine on any street driven vehicle but they tend to have a restrictive exhaust port if you want real power at top end.
i also run hypereutectic pistons and feel they are worth the money !
the makes of pistons are as follows.
cast are the cheapest.
hypereutectic are alot better.
forged is the ultimate high.
forged are mainly for a racing type application but can be used.
the reason the hyper's have a higher compression is merely the dome design of the piston and they come in different design.
whoever you order your parts from will be able to help you determine what the approximate compression will be but higher is not always better as 92 stated before.
try to stay between 9 and 9.5 compression and around 9 is probably better in the long run.