340 in a 65 Barracuda

The '72 mounts don't work on the '65 K frame. Assuming the 273 mounts are from an early A, you'll need a ~5/8" spacer on one bolt to bolt the driver's side bracket to the 340's mount ears. on the passenger's side you need to add a piece to the upper rear section of the bracket to bolt it to the 340. Done.