Dang, man! You're fearless with that numbers matching block....lol. I have a 70 A66 Challenger that I have owned since 1979, and it is all numbers matching. 99% of the parts are even date code correct, so when I get to it, it will be a boring stock type resto. Looking forward to seeing how yours goes and some pics. For what
@Mean416 was saying about refacing the lifters, check out Powell Machines videos on You Tube. He's in Iva, SC and seems to really know his stuff on that subject.