My grandfather's MP Magnum 406 crate motor dieseled, also. I swapped what ever plugs it had in it for a quality brand stock 360 Magnum plug for a Durango and it stopped. We always run pump premium 93 fuel.


Ryan "Bigs" '73 Duster (BLKDUST) - Black, 100% factory sheet metal, flat hood, 346 cid, J Heads, and a bench seat. http://s268.photobucket.com/albums/jj1/bigsbigelow/ Best to date: 12.40 @ 109 mph