Not if you plan to drive it on the street. I (stupidly :BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead::BangHead:) passed on a 68 charger with 440 because it had a reverse manual valve body 727 back in 1992. It would have been cake to switch it back to a regular automatic. All because I didn't want to mess with shifting an automatic on the street as a daily driver, and bought a 72 or 73 318 scamp instead. That scamp was a great daily driver though.