How hard should they be to come out??? The TIII block I pulled out, all of them came out while pulling the pistons... Usually give them a couple light taps with a hammer to get the rod caps off... these bolts simply fell out. Especially #3 which had a disintegrated bearing.
I've never been able to get one to budge before...
Looks like the cast crank and K-1 rods have found a new home. Saves 7lbs on the crank and 100 grams per rod rotating mass.