I have a complete 273 and 904 from a 1965 "B" body that I would like to install in a 1965 "A" body. The "A" body was a slant 6 manual trans, I have already installed a 1965 "A" body automatic cable shift steering column. Do I need to change anything else or will the "B" body oil pan, motor and trans mounts exhaust etc work?