Problems with Comp rockers on AFR 185 heads.

[Infected Mushroom]

Hi guys and girls.

I have a problem with setting up my valvetrain on my fresh Ford 347 stroker ('87 5.0 OEM roller block). I have brand new hydraulic Comp cam with .0598 lift, AFR-185 heads (#1388), Comp Cams Ultra Gold ARC roller rockers 1.6 ratio (19043-16). Using the studs (ARP 3/8") and guide plates (AFR) included in the heads kit. Valve springs should handle .600 lift.



What happens is that when trying to adjust the rockers to roll as close to the center of the valve tip as possible (starting at the intake side, rolling to the center, and back at full lift), the rocker body will hit the pushrod and start to bend it before it reaches full lift. If I lower the rocker on the stud by adjusting the pushrod checking tool, I can avoid rocker hitting the pushrod tool (but just barely), but the rocker roller tip will be very close to the intake side edge of the valve tip. It seems like the rocker is just too short for the heads geometry.

I've googled my a** off trying to find others experiencing this, but came up empty. I've communicated with a tech guy at Comp Cams, but he didn't have a clue. AFR haven't responded yet.

I made some photos with descriptions, hope this helps someone to come up with a solution. An option for me now is to try the Scorpion Race rockers which can handle up to .950 lift, and recommended by AFR.