This was from a posting by Quaddawg on zuwharrie.com
5 on 5.5" circle is a pretty common pattern. You need to watch out for the center hole size, or do some machining. The 5.5 pattern fits ALL Jeep CJ's... but not TJ's or YJ's, or X or WJ's for that matter.
Certain older 5 lug Scouts, certain 5 lug Dodge Trucks, and 5 lug, older Ford Trucks... there are a few more, but you get the idea.
I think I have a chart I made up around here somewhere...
Years Makes and models that will interchange with each other LUG SIZE
46-86 Jeep ALL CJ'S 1/2
85-01 Dodge RAM 1500 2WD 1/2
80-93 RAM 4WD W/HUBS 1/2
94-01 RAM 1500 4WD 1/2
02-04 RAM 1500 (NEW BODY) 2/4WD 9/16
49-96 Ford ALL 1/2 PICKUP 4WD 1/2
49-96 ALL 1/2 PICKUP 2WD 1/2
66-96 FULL SIZE BRONCO 1/2
86-94 Suzuki SAMURAI 2-4 WD 12X1.25
89-98 SIDEKICK 2-4 WD 12X1.25
ALL International 1/2 TON SCOUT I / II 1/2
MAKE SURE YOU MEASURE THE CENTER BORE FOR THE FRONT WHEELS< ESPECIALLY ON 2WD models!!!