Yes sir. Notch is for casting clearance. Will probably have to grind on the rear passenger bone for additional clearance. Will start test fitting these hopefully this weekend. There is a counter bore also to allow the “round” part of the lifter body to rise above the block casting without raising the bone up.
The material for these is 4140 prehard which has a 32RC hardness. The original small block Chevy bones I tested are 38RC. LS’s are some type of nylon so the wear is the concern more than the strength.
Any opinions or concerns are definitely welcome.
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