I am installing a 4 bolt flywheel off a 218 onto an 8 bolt crank off a 230. Had both machined and balanced plus had 4 more holes punched into the flywheel so now its an 8 hole flywheel. Did not notice till now but the crankshaft does not have a ring inside the flange to hold the flat of the flywheel bolts. Its smooth. I checked the original 218 crank to be sure and it has a raised edge that catches the flat of the flywheel bolts.
Even so I got all the bolts tightened down to 70 lbs, but 2 of them keep spinning. I have tried wedging various tools in between the flat and the crank but cant get ahold of them.
Thought about putting a tack weld on them but never tried anything like that.
If anyone has any suggestions, -- how did the bolts on this type of crank keep from spinning?