factory locker I will pull the cover and verifly what locker it is and the gears for 100% sure rpo code is 4.56
the 427 is a 4 bolt tall deck. 100% complete these are excellent motors + you can stroke them out to 526 ci !!! sweet.
came out of a running and driving truck this week, literly a few weeks ago I was out driving in the snow with it. no funny noises no oil leaks has 85,000 miles so its not new but its not junk.
if you pay for it you can leave it here for however long you need. I might be able to move it close to someone for you if needed just shoot me the address and if I'm heading that way for any reason I'll put it in the truck and drop it off.