afraid not. i'm not sure exactly when they switched but there were some major redesigns when GM switched to calling them 3800s instead of 3.8L
https://infogalactic.com/info/Buick_V6_engine
check out the transmission bell thread though. a manual trans bolts to the back of the bell separate from the bell itself. and there are GM factory bells which have dual bell patterns on the front ( Chevy as well as BOP ) and then have both GM and Ford patterns on the back for the manual trans to bolt too.
either way, once you have the proper bell finding something like a World Class T-5 in either a Camaro or Mustang should be pretty easy.