I bolted up my flywheel with the bolts that came with it and torqued them. I noticed that the bolts protrude through the back of the crank a little, maybe 2 or 3 threads and come very close to the back of the block. The clearance is a little more than a sheet of paper. Is that normal? If not, is it safe to use grade 8 washers with the bolts to compensate?

1968 Coronet
1968 Charger
1966 A100 Pickup
1967 Barracuda
1970 Challenger
1972 Challenger
1973 Barracuda
2021 Ram 2500