My first mopar was a 71 RR 383 3spd.tor red with 28k on it bought for $1500 in 79,car would burn rubber for blocks in first gear, I put an 18 spline 4spd.in {paid $100} & left the 3spd on the side of the gas station I worked at & the junk man took it,little did know the 383 only 3spd. trans is the HD version of the a230s,they have the larger input shaft bearing like the HEMI/440 a883s & the duel shifter mounting locations,my friend owns the car & put a 727 in,Im collecting up all the specific 3spd parts & am going to trade him for the 18spline.
PS looking for 3spd parts.