Block out of square

Could you have the .046" taper-milled off the lower section of the bellhousing? That should be easier to fixture in a CNC machine than a shim.

I can't see how he could machine the bell housing?? If the bell face gets cut it will no longer be square with the trans internal center line?? If the problem is with the block,...... cutting the bell will solve nothing. Treblig

My point exactly.