Pulled my head and had it machined.They had to take 9 thou off to true it.Do I now need to use a thicker gasket or is stock cummins okay.I'm running around 50 lbs boost so I'll be putting studs.Anyone have cummins part #'s for 2nd gen 24v head gasket I would need.Multi layer I here is suppose to be good. Thanx Mark.......