Sure its been asked plenty of times. What heads are best for a 455 ? Only really want around 400 hp. Will machined stock heads be good our do I have to fork out 1500+ for aftermarket? And are the offenhauser intakes good?

 

Stock castings, the right cam, 9.5:1 or a little better, and a Performer will get you headed in the right direction.

 

Do I need a certain casting or will any do ? And would I have to change the pistons our could I get that cr with the stock ones?

 

I would look for some c 's or A's . There are a few c's floating around the for sale
section that are rebuilt and ready to go from the add.

 

What year is the 455?

 

Dont have it yet just decided on a 455 and wanna know what to keep my eye out for so I dont pass up the wrong thing or waste my money on something.