Pushrod problem with Speedmaster heads

dart_68 said

Here are before and after pictures. I drilled the holes out to 9/16" (were 1/2") and ground the bottoms out.

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As long they clear at max lift.

Use extra lube at push rods at lifter cup and adjuster. If you dont... they will get hot at break in and show coloration like they do also with lack of oiling.