there may be a way to keep the closed type drive shaft and still get newer moter and trany
my 39 parts truck has closed drive line with old non syncro trany but it has a cracked 235 bolted in.
also and the newer muncie 420 was avilible in some ('torq tube' pickup trucks Im thinking it was in the mid 50s )


Luke Dahlin

1946 Chevy 2 ton
1966 Chevy 2 ton
1969 Chevy 3/4 ton 4wd
http://www.stovebolt.com/gallery/dahlin_luke_1969.html]1969 Chevy 3/4 ton 4x4