determining the rearend on my 54 Ford

Crawled under the Ford today. Found some stamping's on it.

 

D6AW says it's a 1976 part, originally released for "A", big Ford

 

Most bigger Mustangs, plus Mavericks and Granadas came with 8" or 9"

 

It's not an 8" or a 9". Both those rears are a removable third member. The pictured unit is an integral unit like a GM 10 or 12 bolt or a Ford 8.8. The part number says 1976. May be a rear out of a 6 cylinder Maverick or Comet, Granada, etc. Measurements between backing plates and spring pads on the axle would help to determine exactly what it's from.

 

I will get the measurements between the backing plates and spring pads later this afternoon. Thanks for the help guys !

 

So the Dimensions from inside of drum to inside of drum is 50 inches.
And after doing a really good cleaning of the rearend the part number is;
D6AWB

 

50 inches from backing plate to backing plate