small block heads, 4027596 casting # any good??

Go with a 2.05 valve and get a 5 angle VJ, Don't try to grind the pushrod pinch out ! just take about .030 to .060 or so and blend, if you remove it, it will window the port or be so thin that it will crack. don't be swayed by talk of the 2.05" being to big and loosing bottom end, you will gain 8 cfm's or a little more from the start of valve opening, all the way up to max lift.