Is there enough meat on an 18 spline retainer to turn it down to the size your bellhousing is?
As you said, your trans isn't the "correct" one anyway so if you can source a compatible bellhousing, that's probably the easy button solution provided it's compatible with your clutch and flywheel.
Most of the car show "experts" will be too busy yammering on about their uncle's factory 383 hemi 62 Valiant to notice anyway.
Kevin
Not really possible because it would run into the bolt heads, the smaller retainer and bearing has a smaller bolt circle also .
Switching to the 70 Alum 130 tooth bellhousing is the easiest, and probably cheapest, solution .
He seems to have given up , if anyone is looking for the Passon 18 spline OD trans he has it listed for sale ...
