Scored A Set Of Magnum R/T's!!!!!
Nice heads! The MP, R/T heads can go 300 cfm w/a 2.02 valve. Sweet. IIRC, I need to be checked on this, but the pushrod holes should be OK. Regardless, the fix is easy, under a couple of hours if your used to working on stuff, on a bench with good tools.
Also, again, IIRC, and yep, again, I'll need to be double checked, but I do think very much so that these heads are not the cracked prone hindering head of the regular Magnum style head. I remember some where, that the area was addressed pretty well on cooling and something about internals being better to prevent the cracking issues.
You should be ready to rock and roll with these heads.