Quick help with enine mounts

ok, i have a 340 engine going in a 72 duster with a 318 k-member in it.
i have a set of solid motor mounts that were on a 340, in a 340 k-frame. i have a set of shumacer /6 to 340 mounts.

will any of these sets work to put a 340 in the 318 k-frame, or do i have to buy yet another set?


thanks