I bought a freshly rebuilt 440 engine that came out of a 78 Winnabego motor home. I installed it today in the Chargervert,while I rebuild the 440 that came out of the car. I bought a set of spark plugs for a 70 440 and the don't fit. Did the later 440s take a different plug? If so does anybody have a plug number,so I can get plugs that fit? Any info would be a great help. Thanks Pete.