[davepl]

Originally Posted by dwcsr

Run a tap into them, Usually there is some thread damage or some left over Loctite that needs to come out. They need to go in easy so the proper torque is achieved

Brand new flywheel from GM, never been installed! I'll run my cleaning tap though though, but it's every hole, halfway down the hole. If you run the bolt in from the backside, same thing, easy spin till it hits the center. So it sure seems like its by design but I've never heard of it before!