Will I loose HP by swapping out the `74 350 Cu. In. for the `66 340, which has a shorter stroke? Where can I find this info? I also found a 430 Big Block Wild Cat,complete from a `66 Riviera,for $600 , Will it bolt up to `74 Regal? I know that a 425 Olds Big blk, Dropped rite on the motor...