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anyone out there running theses rockers on a 440 with stock type wedge head. I have 452 castings on my engine. running the old Herb McCandless .650 lift comp cam. what clearance issues have you had. so far had to cut them for valve spring retainer clearance and now it looks like i may...

I just pulled some heads off a motorhome 440 and it has flat top pistons, and the heads are 452 casting with the 5/8 small tappered seat spark plug. is there any performance advantages between the big plug head and the small plug head. the small plug head valves look big havent pulled them...