My 71 Dart

This is my new find a 71 dart 318 904 8 1/4 rear. the body needs some work but hey what old dart dont need some body work . but i got two new 1/4's that went with the car. now what to do with it ?? well i have got a 8 3/4 rear i have got an 340 an a 440 an have 727 for both oh i got an 727 tran in the deal to . the guy was thinking it was an 904 . he ask me if it was an 904 and after looking at it and seen it was a 727 i said yea its a 904 . i know that was wrong but hey he said he worked on cars all the time . he should have know what it was. but i did gave him what he was asking 2500
so what to do with this car ????