PowerGlide transmission case, fits PONTIAC/OLDSMOBILE/BUICK/CADILLAC engines. This is an extremely rare transmission case that GM produced for Pontiac. It fits all General Motors engines with the square top case/block bolt pattern.
This case has not been drilled from the factory to fit any Chevrolet engines.
It is of the uni-case design that General Motors used in years past, though not drilled to fit the Chevrolet block. Unit can be built to your specifications, or purchase outright. Can build, ship, install, to your preference. I have multiple PowerGlides units for Chevrolet, and Super Turbine 300 units for Buick, Pontiac, Oldsmobile.