Steve, In looking through a US Chevrolet Master Parts Book (1929-53), bellhousings are listed as different for passenger cars VS trucks. No difference between 216 and 235 engines. That being said, if the main center bore of your existing 216 housing matches the size Lugnutz noted, and the T5 you have has the standard Saginaw/Muncie bolt pattern, you should be able to use it to mount the T5 to your 216.
There are other things in play concerning the length of the T5 input shaft then, but you can read up on those and how to resolve them in Lugnutz
T5 Info Page as well as lots of conversation in the
Driveline forum.
