crenwelge writes, "I can't feature using a "special jig" which plugs into the pilot bearing hole. I would like to see one of them critters."
Here are several. I am sure there are more. Red billet aluminum method is the best. This a precision lathed centering device accurate within one - two thousandths of an inch. This is a "go - no go" method. Bellhousing is simply adjusted until the sliding ring slips right on in.
Two others in my graphic are similar, one is a centered bolt on, the other is a bolt on pilot hole centered method.
Bellhousing Alignment Couple decades back I visited with a boy we met in Las Vegas. He is or was in the business of building NASCAR components. Cannot quite remember, seems we visited with him in South Carolina. He used a method which has a rod stabbed into the pilot hole and a machined cast iron "saddle" which bolted to the holes for a transmission. Dial caliper slid back and forth on this rod. This is probably the best method for duplicating how a trans will fit, this bolts right to the mounting surface as a trans does.
Most serious problem with a dial caliper method which is not securely bolted in place is the roughness of the hub hole in a bellhousing. You roll over bumps, depressions, ridge runs and such, leading to inaccurate measurements. This roughness will also move the whole setup, like a magnetic base unit, move the entire system around knocking off all measurements.
Billyray
