i am running pro magnum roller rockers on my sbc 355 with dart pro 1 heads.

should i get longer rocker studs? i am running a .100 long valve and .150 long pushrods and the poly lock screw seems to go down too far.

what is the arp number for 3/8 long studs?

Check out what the guys are saying about those RR's here:
http://www.nastyz28.com/forum/showthread.php?t=85161

The ARP part # is 7104

thanks, i will probably get them. need to do a few things before i race it.