Pretty standard wheel for the truck back in the day.
They are 10 hole Budd wheels.
The front used only 5 lugs.
No plate the hubs are drilled for five studs.
GM used that five front system well into the 90's on medium duty trucks.
Tom

1951 GMC 650 Diesel
1958 GMC 550 Wrecker
1964 Chev C-80 427cid Tandem
1947 Dodge WDX Power Wagon
1977 Chev K-30 400 cid
1984 Chev K-30 Cummins 6BTA