Since I am using a T5 from an S-10 that was equipped with a 60 degree 2.8l V6 I had to find an adaptor to make up for the longer input shaft. I have ordered one from Vintage Metalworks in Atwater, Ohio.
I will be using it with a bellhousing from a '79 V8 Monza as I am more comfortable installing a cable-operated clutch than fabricating linkage or messing with hydraulics.
Another way to go without the adaptor is to use a bellhousing from an Astro van that was equipped with a 4.3 V6 and a T5. Be forewarned that these are rare...and expensive.