The Chevy and GMC bellhousings are similar, so the same process of adapting the T-5 will work with either engine. Lots of Chevy/GMC engine swaps have done in the past 60-something years so it's not uncommon to find a GMC engine in a Chevy. Basically a GMC is about 2" longer and needs some front motor mount and radiator position modifications.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!