Mating a 4 speed to a slant, question on years

He needs a late '68 & up flywheel. It's a 74 motor

I THINK this is correct because the 68 up flywheel would fit tight on the newer crank . The 67 flywheel would have a pilot hole too small to go on the larger crank pilot. Easier fix than on the automatic. Since he's using ALL 68 and newer parts, there should be no problem. Sorry for the false alarm!