After you get it back to Clinton and have had a chance to check it out we should talk? Check the drivers door opening for the Vin tag, it's pop rivited on the wheel hump. For reasons that only Mother Mopar can fathom most of those cute lill' Pickupz came with a stump pullin' 391 open rear in 'um and everything waz(check the box) optional extra on the earlys? 55MPH at 4500RPM. Poor lill' /6 would scream so loud there waz no way to have ah conversation with your passenger, I swapped the one in mine for ah 276SG and it loved me for that by taking itself from 16 MPG to 21MPG and I could actually talk with my friendz when we went trailer truckin' and bone yardin', lol