it is a drive shaft. i dont know what the bolt pattern is off hand, the car is a few miles from home right now.
could it be an 8.75? i have this picture.. can the pattern be identified by the wheels? yea, i bought it on ebay
That's my guess also, mopar 8-1/4". The bolt pattern looks right and the pinion snubber bosses too. And the brake line clip.