Here's my 69 dart I just got finished with the drive trans. Original slant 6 904
7 1/4 rear . I swapped out the front K member out of a 74 dart swinger front disc brakes ,318 built with Keith black 10.25 to 1 pistons. I'm really happy with the power the car has since I have drove the car with the 225 for 28 years . It's like a new car now .