Just installed tti headers !
the spool mounts are much tougher to adjust. I didn't need to with my spool mounts. But I have to ask, why is you motor off 3/4" from the TTI needed dimension?
Do you have worn motor mounts?
I took the advice of a friend that was one of the top TTI sellers in the country.... We put the motor in with no trans. Mine was tougher to get in because of the very close fitting milodon road race oil pan.