I was reading earlier threads on adding power programmers or tuners but don't install them unless you put new studs in now the question is if the head gaskets show no sign of leakage can you put in new studs or do you have to change the head gaskets

Planning to install power tuner later on
03 F350 6.0L PSD cc Lariat 4x4
93 Explorer 4.0L Ext 4dr 4x4
84 F150 5.0L Reg cab 4x4
77 F100 390hp Stepside
70 XL 390 2dr
70 Mach 1 Fastback 351c