I had to do a lot of clearancing on my KB block for a typical straight 3/8" pushrod. Only slight clearancing on the heads, but even the head gaskets needed grinding on so the pushrod didn't rub them.
Probably had the heads on and off the motor 40 times, lol.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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