I found this post from Turbo-6 on Flywheel bolts
From what I have seen don't run an inline at 3000 RPM constant, the problem is harmonics, when I drove my car on the street you could not see out the rear view mirror at 3000, it would vibrate so bad, above and below was fine.
If you keep the flywheel on the next thing to come off is the pin in the flywheel then the harmonic balancer in that order. Be sure that the bolt is in the balancer.
I use a strap as a lock to hold the flywheel bolts and the pin from moving, Two bolts go through the tab and hold the pins the ears on the end of the tab bend over the flats of the bolts.
Harry
