How many OEM 440 blocks have you encountered with significant lifter bore issues? As in either lifter bore alignment or bore sizing issues bad enough to require bushings?

As many of the engines were on the road for thousands of miles, I'd think that wouldn't be a frequent problem. However, considering the difference in how critical lifter-to-cam alignment is with more radical lobes, have I been blissfully ignorant?

FWIW, one of my blocks has the lifter bores bushed. But that was what my former engine builder did when the lifter bores were scored so badly after I wiped a cam big-time from too much spring pressure... when he selected the springs... and ran about 40#s more open pressure than the cam grinder specified. But that's a story for another time...