1971-1971 CJ-5, CJ-6 w/ 3.8L (6-232) Engine w/ 8.5:1 Compression;
1971-1971 CJ-5, CJ-6 w/ 4.2L (6-258) Engine w/ 8.5:1 Compression;
1971-1971 SJ, J-Series w/ 3.8L (6-232) Engine w/ 8.5:1 Compression;
1971-1971 SJ, J-Series w/ 4.2L (6-258) Engine w/ 8.5:1 Compression w/ 8:1 Compression;
1972-1972 CJ-5, CJ-6 w/ 3.8L (6-232) Engine w/ Shaft Rocker Arms w/ 8:1 Compression;
1972-1972 CJ-5, CJ-6 w/ 4.2L (6-258) Engine w/ Shaft Rocker Arms w/ 8:1 Compression;
1972-1972 C104 Commando w/ 4.2L (6-258) Engine w/ Shaft Rocker Arms w/ 8:1 Compression;
1973-1973 SJ, J-Series w/ 3.8L (6-232) Engine w/ Shaft Rocker Arms w/ 8.5:1 Compression;
1973-1973 SJ, J-Series w/ 4.2L (6-258) Engine w/ Shaft Rocker Arms w/ 8.5:1 Compression;
1974-1974 CJ-5, CJ-6 w/ 3.8L (6-232) Engine w/ Shaft Rocker Arms;
1974-1974 CJ-5, CJ-6 w/ 4.2L (6-258) Engine w/ Shaft Rocker Arms;
1974-1974 SJ, J-Series w/ 3.8L (6-232) Engine w/ Shaft Rocker Arms;
1974-1974 SJ, J-Series w/ 4.2L (6-258) Engine w/ Shaft Rocker Arms;