[DanEC]

I think it's a good idea while at it, to measure the flywheel for run-out (deviation from flatness). I've heard some disagreement that it isn't worth while because the crank flange could be part of it but in my case anyway, it has identified a warped flywheel.

Lakewood BHs do have a reputation for being kind of sloppy and Quicktime have a reputation for being pretty concentric - mine was well within tolerance out of the box. I believe Lakewood bought Quicktime (could be the other way) but they have not been jointly held very long.

You need a dial indicator and magnetic base to check the bellhousing. After the flywheel and bellhousing are bolted in place, the dial indicator needs to be set up in the center of the transmission register with the pin riding on the edge of the opening. Mark the bellhousing at 90 deg intervals and rotate the engine to where the indicator lines up on the first mark - record the dial reading (don't need to zero the DI) - then rotate the engine to the next mark - record the reading - etc. for all 4. I like to run everything at least twice to make sure I'm getting consistent readings.

Assuming all 4 dial indicator readings are on the same side of zero (0), take the difference of the largest and the smallest reading and divide by 2 and that represents how out the center of the bellhousing register is in relation to the crank centerline. It can be calculated in both axis but the one with the greatest figure is the one to be concerned with. Hopefully you will be within .006 inches as that is the usually quoted reference standard.

If it's coming up with excessive tolerance then it will require a set of adjustable dowels and some time spent wiggling it in until it's within tolerance. That may take some time. An hour to do the initial check is not unreasonable if you have the engine to where the flywheel and bellhousing can be bolted up.

I don't have a picture of my DI set up but maybe someone has one they can post. Setting up the DI to read on the edge of the bellhousing opening may be the most time-consuming part of the testing.