[raceman408]

do you need valve reliefs in f/ts for .545 .550 233 237 @ 50 lsa 113 cams thanks for your help

 

[twin turbo 281]

PI or NonPI?

 

[The Great Obucina]

which cams?

 

[GreenBird]

Those are patriot's grind. Nothing more than a 270AH minus 1 degree of duration on the intake and exhaust.

No, you don't need reliefs, but you can find the real thing at atlantic speed for basically the same price.