Picking the "right" 383 block? Different styles?

Most any 383 should work[on gts 383 dart] with the right mounts and drill and tap the 2 bosses on front of block for correct motor mounts,some already have it,also would need to hunt up or buy repro exh manifolds for that paticular engine and yr,am sure there are some other manifolds that will work,same with the 340 they all should interchange no prob with correct mounts and exhausts...there have been some parts and correct items that you are looking for posted here in recent past or place a wanted ad for parts you need and someone will help you out,may have to be a little patient but usually you will find them...