You’ll just need to be careful about piston choices. I’ve been going through the same thing selecting pistons. The blocks are the same. It’s the pistons and heads that were different. Don’t think you can even buy the early lifters. Just get later pushrods. Don’t get the cheap ones with the balls welded on the end. My customer had one break off and cause catastrophe failure. My build is using later open chambered heads and seal power forged pistons with the higher compression height. They make cast pistons with a lower compression height. I don’t use the KB hyperutectic. I’m out of town visiting with the kids but I can dig out my measurements by tomorrow morning and post them. It should help you out.

See my post below. I had some time to kill and had my infor with me.