1971 Challenger trany id and questions.

[Ralph]

See the attached photo - can someone decode this 4 speed and tell me what year and car this came out of. I knew it was not numbers matching when I bought my chall and the trany is leaking so its coming out for a rebuild.
Do 383 cubic inch RT bell housing have additional bolts on each side like the photos show or is the bell housing wrong ? 2 additional bolt holes on driver side & one additional on passenger side.
Thanks for the comments.
Ralph

 

[413]

Trans case is from a 1969 B-body. Everything else can swap in that case so no idea what it is from the photos.

The 1970-71 BB bellhousing has bolt pattens for 3 speed and 4 speed. The numbers are behind the trans, So it could be the right one, It should be aluminum, is it?

 

[Ralph]

Yes, it is. Will get the numbers off it when it comes out and update post.
Thanks for the help.