Hello people..ill be around asking tons of questions as im about to begin an engine swap from a 318 to a bb I found in the RV my sister gave me..It runs great so thats good. It took me all day to find out what size the motor is. I finaly found a flat spot on the front of the block stamped HT 413 not sure what the HT is but im sure if it moves this 35 foot rv it should move my rancharger just fine..lol