I don't know. I tracked down the manufacturers for OEM in 1968 and for A-Body it was a Bendix (crimped canister) or Midland Ross w/ clamp around the canister. Diam is about 9 in outside for MR and vacuum valve sits at about 10 o' clock looking at the brake booster from the front. A parts book for 1970 model year will help with type and pic's.
