A-904 numbers

I picked this up this week for 50.00 the guy said it was driving when they took it out. He said it came out of a 71 Duster with a 360. I got the numbers off of it today and was wondering if anyone could tell me for sure what it came out of. bellhousing 452-2 right front side of tranny 1B3018 TT Thx, Double Six