Washers, yay or nay, on stock head studs

[47topless]

Should I use hardened washers, with the stock nuts and studs, when installing the stock iron heads on a 59 AB? Was there a reason that washers were not used originally on these engines?
In my practical mind, it seems like washers would greatly assist in maintaining the torque value, on these nuts, as the engine is run and warmed up.