Don't know what 235 bell housing you are trying to mate too, but there were 1940's vintage Clark 5 speed over drive transmissions that swapped in the non-synchronized Chevy 4 speed bell housing.

My gut says that something from 1988 will not work.


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures