1970 dodge dart 7 1/4 bbp rear end or 8 1/4 or 8 3/4 complete

Just completed front disc conversion this weekend looking for a 7 1/4 bbp rear end complete with brakes. Need ASAP as I can't drive it until I find one. I don't want to invest in a 8 3/4 unless I find one cheap. Please let me know what you all have.

Thanks Blake