Wheel Washers

[Dirtrack49]

My somewhat new to me "Restored" 1930 Town Sedan has been a multitude of mechanical problems since I purchased it in August of 2019.

Getting ever closer to the light at the end of the tunnel, I am currently inspecting wheels, bearings and rear end components.
The car came with conical wheel washers. Having read positive and negative threads concerning these add on items, I decided to remove the wheels for inspection. I found that all wheels are in good condition with no deformity to the lug holes. However, on the right rear wheel, the DPO used multiple washers evidently as spacers. Upon closer examination, I find that the studs are longer on the right rear versus the left. The only thing I can think of is that someone replaced the studs using what should have been installed on a cast iron drum? The stud measures 1 inch from the drum on the right, vs. 11/16 on the left.

So, I ask, is this safe to run like this?

Thanks for any and all help.

Tom L.