Bottom of trans. Also it has no 4 pin electrical connector for a locking torque converter. Thats OK. I will be happy with a 3 speed. Nice upgrade from the 2 speed Jet Away. No OD is not a deal breaker either. I am ditching my original TH-300. The TH-350 is so much more supported. This is one of the last big projects for a marathon restoration. Its a 1966 Sports Coupe with its original 330. Bench seat, pb, ps and AC. 75 K on car. I am the second owner. Tail end of a frame off.