The only options I can find are: F100 power steering box (Large and changes the geometry of the column, but uses the original pitman arm.) Isuzu tooper (Small but not a very strong box and requires some frame modifications and you have to use a custom pitman arm) Pretty expensive also. Jeep box (This is the one Extreme Kustom sales. Supposed to be strong and does not change the geometry of the column and uses the Merc pitman arm. Some frame mods.) Are there any others? I'm thinking of going with the Extreme Kustom Jeep power steering conversion kit.