65 A body transmission?

My 65 C-body is a big-block cable-shift w/ slip yoke (1 yr only), but is longer than SB and won't bolt to the block either.

I think your only option for a slip yoke is to have a custom drive-shaft made w/ an integral slip section. There are posts here w/ photos. Isn't terribly expensive (~$300). This approach was begun by Jeep guys who also have the ball & trunion drive-shaft (77-78 Cherokee if I recall).