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Brent,
I had similar experience before I cured push rod breakage problem. I had to do extensive clearancing of the manifold to eliminate all rubs. Secondly, I found stock push rods did not yield correct push rod to rocker geometry because the stock rockers were much higher than the FE MAX roller rockers. Wear patterns should tell the story. If clearance is the problem, choose 5/16 rather than 3/8 dia. rods but must be high strength moly material. Smith supplied mine. You must specify ball/cup diameter and effective length. Use a wire guage to check clearance between push rod and bore before giving it your blessing. It's not hard work but it is tedious. When you get it corrected you will be very pleased to have done it yourself.
Paul
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