i was wondering if there was a difrenece in the heads to where you can or cant use a cr head on a 24v engine i need to do a head gasket/o-ring job on mine but dont want,or need my truck to be down a week or 2 while the machine work is done was wondering if a cr head would fit and if there would be a perforance advantage?? i have heard the cr have better gaskets so thats why i think there may be a difference