Mine was out of a 71 340 Duster. But I have to agree with grimreaper, any 10.5 bellhousing will work with the small pilot hole. They started making them in aluminum about 1969 thru 1974. I think you can even use a 75-1980 bellhousing if you can find the 5.125 in the the small, 3.70 bolt circle, front bearing retainer, but double check with Brewers or Passon Performance for sure.