small block motor mounts?

340 and 318 mounts are different. DONT lose the 340 mounts. $$$. Buy a set of 318.mounts for like $40??
@RAT ROD AL may have some.
I am working on a 1972 duster. The car came with the original 340. I am wanting to use a 1966 318 just to keep the car mobile while doing the restoration. I took the motor mounts off of the 340 and put them on the 318 but now there is not enough room for the fan. Everything is to close and suggestions?