1964 slant build
.050 is not enough to worry about. Make sure you cc the heads to know your combustion chamber size for future compression ratio calculation.
I think you would be happy with some oversize valves and a good porting and blending of the bowls/ports. A LOT of locked up potential in a slant head.
I like to mill the block, but if its not coming out, just do the head.
2.94 is a good all around gear for daily driver with standard diameter tires. I run 25.5" and a 3.55 and it spins a bit higher than I like on the highway.
Good luck.
sb