Made by Can EV, factory adaptor. Fits most all Chevy common trans bell housings including automatic. (SBC pattern) Hub is for 1-1/8" (I think) shaft common to the AC35-AC50 motors and big DC motors. Flywheel/flex plate pattern is for later Chevy -the smaller one) comes with all...
I'm selling my EV Adapter Assembly (AD2111) for a 9" motor. It's brand new and has never been installed.
I can send you picks of mine if you want to see it.
San Jose, CA