Ok I have a 78 LRT that is low optioned but does have suregrip 3.55s. Never restored and is my daily driver 80 miles round trip. It gets 15 MPG @ 65MPH. It has 220K miles. Vin is D13BS8J517224. I am the second owner and the orignal owner has past on to the great Mopar Heaven. He said that the engine has never been out but the Vin dont match the engine number. The engine build dates on all the parts are from 1978. Add this one to the list. My son is working on a 66 LWB Poly 318/A727 but its not in your years. DaveJ