Greg is correct as long as the pushrod is not way too long or way too short. In other words, 6" versus 5.95" versus 6.05" will not cause this but 6" versus 4" versus 8" definately would.

Although it may be totally insignificant, 6" versus 5.95" will defeinately have SOME affect on wear at the push rod top end and with the rocker end that it contacts.

Having no personal experience myself I am probing to see what others have done and what results they obtained before I blindly make uninformed assumptions and screw up something.

Mike Barnes
1950 GMC 1-ton pickup