Hi us74k5!,popacom / BILL in Ky. here. I am in the process of putting a 6.2 HUMMWV motor in my M-561 Gama Goat and was faced with the same issue, I looked at the local wrecking yards but the 6.2 was not a real popular civy motor due to early reliability issues that the military weeded out during their use in the CUCV and HUMMWV programs. I found the best route to ensure the right flywheel is obtained is to buy it NEW from one of the many national auto parts dealers. I got mine
from "O'Reilys auto parts. Hope this saves you some time and effort, because if you get the wrong flywheel the inbalance sitrep can be a real no-no. Good luck and be safe till ya get back home man!
Thanks popacom / BILL in Ky. KI4QQB
P.S. I called for a flywheel for an 84- Chevy Suburban W/6.2 this was the one G.M. parts guy quoted me as being correct.