Nelson, The shafts that I checked didn't have any marks on them. I still had the engine set up to measure for my engine swap so, I took measurements from it and the transmission. I think this should give you what you need to know. I added the flywheel counterbore measurements so you could make sure your clutch disc will clear the flywheel bolts. Let me know if there is anything else you need.
Mark

 

Mark,

Very nice drawings. You are a gentleman and obviously a scholar. I believe I have everything I need dimension-wise concerning the old configuration. I just need to measure up my NV4500 input shaft, do a little figuring and I can order my aluminum plate.

Thank you both Mark and Jules for sharing your time and measurements.

Nelson