With a 351 Cleveland you can get a trans from 250,300 289,302 or 351 Windsor.There is the c6 or c4 in the 80's Ford changed the balance of the flywheel on the 302 from 28 oz to 50 oz.A Cleveland would need a 28 oz. flywheel.Other thing is Ford used a 157 tooth and 161 tooth flywheel you can buy them new I believe Summit sells them.I put a 351w in a 56 Fairlane used 1977 302 F150 motor mounts and it bolted down to the frame on the Fairlane.