340 Hydraulic Roller Available?

dano said

Better check the chamfer (or counter sink) on your lifter bores. Some are cut too deep and expose the lifter body oiling recess. A smaller base circle cam can sometimes help this so it may not be a drop in. My 72 block was chamfered too deep. 360 blocks seem to have far smaller chamfers.

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Is there a dimension for the chamfer or length of the bore that is considered acceptable? A distance to the centerline of the cam bore? I've got a 340 block that I want to run a roller in (probably a solid) but if I have to put a ton of money into sleeving the lifter bores, I'll probably change my thinking. I don't mind grinding for link clearance if needed. I'm going to deburr the entire block and look into oiling mods before I get it machined. Mine may not see enough lift to make a difference but I'm interested none the less.