Just wanted to get some input on what other mods should be done since the cab is coming off and the engine getting tore into. As of now ARP head studs, upgraded engine oil cooler, thermostats,aluminum radiator, and new cylinder head gaskets are getting replaced. The truck already has Bulletproof EGR coolers, and AFE intercooler, Banks intake, and SCT tuner with DPF delete. I dont want to do any mods that will not allow it to smog (the rest of the mods can easily be swapped back to stock). So any suggestions would be appreciated.

 

i thought the 6.4 didn't need to be studded