That I fully understand. Had I known, I may have opened up the pushrod holes BEFORE the whole engine was assembled. Well, I learned two lessons. One about pushrod clearance, one about where not to shop.
Pushrod clearance is just a thing with building engines that are not bone stock ...I ended up drilling my victor cnc`d knock offs with a 9/16 drill bit before I got clearance , but they use offset rockers too...just part of engine building .