Turbo conv. clutch help needed!

[dclose@tcadvertising.com]

While attempting to put an MC engine in my 88 80Q, I found that the splines
of the trans. input shaft don't fit a 5KT clutch disk. The 80 shaft is a
larger diameter than the 5K. I didn't anticipate this!
I could use the stock 80Q clutch, but it is a little smaller than the
turbo.
I think a 90-91 Coupe Q might have the correct diameters. If someone has an
old disc from a Coupe or a 20V 90, I need to know the diameter of the
splines and the outer diameter of the disk.
Or, if someone knows the key parts to this problem, please help.
Any comments are GREATLY appreciated.

TIA
Dave

P.S.: I'll give a full report of the conversion when I'm closer to the end.