Rocker arm stud

Too late for your build, but when I redid my heads this past Winter, with a VERY in-the-know builder, he said as long as I was staying in the 6000 rpm range, with 400-450 hp, he felt the boss/fulcrum/bolt system was fine. I did upgrade to the Ford Motorsport bolt in roller rockers - flat tappet hydraulic cam.

Larry

I had mine set up & machined for 7/16" studs, these are ARP. Can't do much better than that.

With Comp cam rockers and Manley guide plate's,

Mark

Those are both excellent ways to go. The bolt downs work very well and require no machining at all.

I've got blue Ford Motorsports,1.8:1, on 7/16" screw in studs with Boss guideplates on my A3 heads. Solid lifter camshaft.

No pictures to post though sorry. I never though anyone would be interested in seeing them.