5.0 swap drive shaft too long

I performed a 5.0/t-5 swap into a 4/aod car several years ago...we just used a standard 5.0 (T5)driveshaft and everything lined up with no issues...at all. The driveshaft end yoke is the same amongst all models 79-93, and I'm pretty sure unless you swapped to a 31 spline tranny yoke, the front yoke is the same. If it's not seating all the way into the tranny, then you may have a different issue.

The driveshaft originally in the car did fit with no issues, but we had a 5.0 driveshaft available, so why bother with the 4 cylinder version?

my driveline was bent and we tried a auto one it didnt work it was the same length but wouldnt slide in the t5 all the way, u joints were different too, i had to get a 5.0 t5 one