Are stainless valves harder on stock iron head seats?

What RAMM said
Mopar heads are harder than chevy/ ford etc
so usually stainless works just fine
and MOPAR motorhome valves are even more premium- exhaust may be Inconel
that said I put in the premium Dura Bond sintered seats in most of my builds especially trucks/ motorhomes
put seats in if your seats have any rescission
if not they are work hardened
on the valves
you have to match the valve stem materiel and finish to the guides
unplated stainless valves- the budget ones act like files I OD hone them
I prefer hard chrome valves to flash chrome ones
I use the spiral grooved guides and even knurl and ream NEW guides then hone to give some oil retention
Unleaded is here to stay
and center two exhausts run HOT
Viton stem seals