WDEA- JKOB is right, they usually do fit either pre or post 64 Model 70's.
I was unhappy with the fit on one late New Haven short action, though. The Weisner's piece had a loose wobble when first installed. The bolt release needed to be ground by a gunsmith so it didn't hit the shroud, and the peg on which the release rotates was replaced with a larger one. I also had the checkering re-done. As delivered, the checkering was pretty thin.
The Weisner's bolt release is a huge improvement over the original. I'd suggest you order one and if it doesn't fit, talk with JKOB, or Redneck.
