Auto to Manual swap (the pesky spacer)

I used the auto flex plate bolts on my flywheel when I did the conversion a few months ago.

The accepted minimum thread engagement is equal to the diameter of the bolt. so a 12mm diameter bolt should have 12mm of thread length engagement into whetever it is being threaded into. Usually it is acceptable that "fine thread" bolts can have a little less enagagement.

Anyway, my point here is that the thread engagment when I put them through my flywheel was greater than the diameter of the bolt, so I felt comfortable with this. I drove the car VERY hard like this for a little over a month, I'm now in the middle of a turbo and EFI swap. I'm also swapping a 5 speed in from an '81 ZX that I just removed from the donor yesterday. I had wanted a 5 speed all along, but couldn't find one at a reasonable price, so I installed the 4 speed that I bought with the car (it was supposed to be a 5-speed).