TOPIC: 1959? Gator spline / hub size.

I am considering the purchase of a 59 Larson Plaboy that in the owners photos looks as though it’s sitting on a vintage Gator trailer. I will have to travel 5 hrs home if I buy it and the tires don’t look very fresh at all. I was thinking I could remove the tires , rims and hubs from my current trailer and swap them out for the journey home. My current rims are 4 lug, 4” on center with a 2 3/4” hub opening. Any advice would be appreciated. Thanks,Marcus.