length? what are you planning to use for a rear drive shaft?
your stock drive shaft is about 18" collapsed. the turbo 350 is 6" longer than the 3speed manual, the 205 is how much longer than the stock dana 20? I really don't think you will have the room to do it.
the tubo 350 with a dana 20 will work, but you might need to eliminate the fan and move the engine forward, as close to the radiator as possible.
good luck, jjc