The AMC 258 was introduced in 1971 in J-series pickups and Wagoneers and in 1972 in CJs. It continued to be used through 1990 in the Wrangler. The great thing about this engine is it reliable, inexpensive, and has horse power and toque peaks at low RPM. However many people do not like the carburetor it came with and updgrade to a 2150 style carburetor this adapter plate allows you to do that.
It will fit the following makes and models:

IMPORTANT NOTE ON THIS KIT it only fits if the spacing on your Throttle lever is 2 5/16
1972-1990 CJ 258 4.2L 6 Cylinder
1972-1974 CJ5 258 4.2L 6 Cylinder
1971-1975 CJ6 258 4.2L 6 Cylinder
1976-1985 CJ7 258 4.2L 6 Cylinder
1974-1983 Jeep Cherokee 258 4.2L 6 Cylinder
1972-1973 Jeep Commando 258 4.2L 6 Cylinder
1972-1973 Jeep Wagoneer 258 4.2L 6 Cylinder
1980-1983 Jeep Wagoneer 258 4.2L 6 Cylinder
1984-1986 Jeep Grand Wagoneer 258 4.2L 6 Cylinder
1974-1987 Jeep J10 258 4.2L 6 Cylinder
1974-1976 Jeep J20 258 4.2L 6 Cylinder
1971-1973 Jeep J-100 258 4.2L 6 Cylinder
1971-1973 Jeep J-2500 258 4.2L 6 Cylinder
1971-1973 Jeep J-2600 258 4.2L 6 Cylinder
1971-1971 Jeep J-3800 258 4.2L 6 Cylinder
1971-1973 Jeep J-4500 258 4.2L 6 Cylinder
1971-1973 Jeep J-4600 258 4.2L 6 Cylinder
1971-1973 Jeep J-4700 258 4.2L 6 Cylinder
1971-1973 Jeep J-4800 258 4.2L 6 Cylinder
1972-1990 CJ
1981-1986 Jeep Scrambler 258 4.2L 6 Cylinder
1987-1990 Jeep Wrangler 258 4.2L 6 Cylinder
1972-1974 International Scout II 258 4.2L 6 Cylinder

Kit Comes with:

CNC Aluminum Machined Plate 5/8 thick
Two Gaskets
Bolts
T Bracket
Nuts Bolts
Drill Bit