Installing Pushrods on 318 with 302's

MOPAROFFICIAL said
Good to check everything... but your issue is not caused by simply putting a flat tappet cam into a roller block.

You have either over size push rods or jacked up machining.

You dont even need over size push rod holes till you go roller...so how else would you end up with interference between the push rod and head. lol

Not true. It is a change in geometry that causes interference. OP more than likely has clearance issues like this. J.Rob