I would take the rims to a machinist to have him drill out the holes to the correct diameter.
Or, see if the seller will exchange the wheels for the correct ones.
I kept the lever shocks on my '54 and '55, but installed heavy duty rear springs and a heavier duty front sway bar. It made a big difference in handling.
It's time for my '55 Special to get new spark plugs. It now has AC44 plugs and I'm thinking of using Auto Lite 175 plugs. The car has the Century equipment (4 bbl) and Pertronix ignition and runs very well.
Would the Auto Lite be a better plug than the AC?
The weight of the hitch is 8 pounds. I will send you pictures to your cell phone if you PM me your number. You may have the hitch for free; just pay for shipping. Such a deal!