Originally Posted by wc3john
No i havent verified but I guess they will be getting a call tuesday morning.
I dont know if the gt40'suse 7/16''s... Will have to try that as well.
I was figuring the comp cams lifters and ultra-gold rr's but didnt see any in that size. hence why I asked the original question at the top of the post
I have been doing some reading about Dyno tests of 5.0 engines.
For the most part and unless they have been highly modified almost all of them produce their peak torque in the 4800-5500 RPM range. The HP is similar, but sometimes creeps onto the 6000-6500 RPM range depending on the engine build components.
If that is the case revving them over 6250 won't do you much good anyways.
I bet the GT40 heads use 7/16" if they are originally off of a 5.0/302.
If (and I don't know if any ever were) they were originally on a 351W then they would require 1/2" head bolts.
Are you considering aluminum heads any time soon?
If so, then I don't think I would bother buying a set of rocker arms for the GT40 heads and save that money back for a set of stud mounted rockers instead. Or, for now convert your GT40 heads to be able to use stud mounted rockers, which would work when and if you ever got better heads.
The RR arms I mentioned above are actually lighter and stronger than aluminum ones.