nahh kidd I got this…
I have all the measurements based off crank center for the SBC 90deg (standard GM bellhousing) and the 1.8T, 1.9 TDI, 2.0, (all the same) measurements off crank center. measured the crank face to input shaft on a small bock and the powerglide here. now all I need to do is overlay both bolt hole patterns on some 6061 and mill it out. that will get me the mating surface for the bell and the block perfectly concentric crank vs input shaft. , then all I need is the difference from the crank mounting face from the VW and the Chevy motor, thickness of the flexplate and the distance between the flexplate to a reference point inside the transmission bellhousing (end of input shaft)… compute all that and that tells me the thickness of the adapter I need for the crank. Which can be off quite a bit I read depth wise. up to 3/16th of an inch I hear? To engage the converter to the pump. if thats true it makes the machine work even easier. then wack the hole in the adapter plate for the starter as per the measurements on the GM 90 deg layout and I can use a standard boat anchor chevy starter and what ever tooth flexplate fits in there correctly.
Essentially making the vw motor and crank into a small block chevy. So all over the counter parts can be used.
Were did you get your bell pattern dimensionality from? You do realize that this stuff needs to be within ~5 thousandths or you’re going to be fucking up bearings very quick right? This is not something you can just eyeball with a vernier and hope for the best on a mill. I hope you pulled the specs from a credible source.
We’ll discuss this more when you come and get the steering rack Thurs.