That sonnys engine is a ford based engine from what I have read up onit. His "hemi" head is nothing hemi except for plug location, and thats a stretch. Its a canted head design. Its a HELL of an engine, and should be for the price tag. Id love to stick one of those in a 4x4 lumber wagon. Hoe cool would that be to cruise up to the local wood pile, and say "I better check the oil on this ol girl" to your buddies, and open the hood to that beast!