Hey . . .
just checking in - - - I hope you have fun with your T 5 tranny .
I installed a '93 GMC S-15 W/C T5 into my 69 Nova , back in March
2018 . . . and been having fun ever since.
T 5 : 93 - 2.8 / V6 , W/C with (about 300,000 miles) . . . .
using the stock S-15 = 14 spline input shaft , TRANS Cast in 1992 ,
with the 'Muncie bolt pattern' . . . . NO adaptor needed .
later , jim