If 19.5's will fit over your rear drums (won't on some trucks) then you can use simulator wheel covers. 19.5's wouldn't fit over my 48 rear drums though,
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)

Raising a teenager is like trying to nail Jello to a tree!