Let me ask this question since I need to ask it before I get into our build. I have Dart Pro 1 aluminum heads that came with guide plates and rocker studs (figured that was a bonus at the time as I did not expect heads to come with them). I am pretty sure the plates are not going to do me any good as I believe they are 5/16 (have yet to put caliper on it but think that spec is on the build sheet) and I plan to use 3/8 rods. So here's my question. How do I know the rocker studs that came with the heads will even work with the roller rockers I plan to get? In other words, do I need roller rockers, pushrod, and guideplate on head just to figure out if these rocker studs that came with head would work? Or is there another way?