If you want to save 10 hp and about 15 lbs, you may want to change to a manual steering box. Below is a list of direct bolt-on boxes and some that need modifications.
Interchange #706 Buick Special 64-70 Camaro 67-74 Chevelle 64-70 Chevy 65-70 Firebird 67-73 Grand Prix 69-70 Monte Carlo 70 Monza 75-79, 8cyl Monza 78-80,6cyl Nova 68-70 Olds 64-70 F-85 64-70 Pontiac 64-70 Skyhawk 75-80 Starfire 75 Starfire 76-80, 6 cyl Starfire 77-79, 8cyl Sunbird 76-80 Tempest 64-70 On some 64-70 the drag link hole on the pitman arm may need to be enlarged.
The following boxes will fit but may need to have the pitman arm and/or the rag joint changed or and extra bolt hole boss taked off the steering box. Make sure you compare the input shaft length or the length from the bolt holes to the end of the input shaft to your power box.
Interchange #999 Apollo 73-75 Omega 73-79 Chevelle 71-77 Skylark 75-79 Monte Carlo 71 Regal 73-74 F-85 71-72 Nova 71-79 Lemans 72-77 Cutlass 76 Ventura 71-77 Phoenix 77-79 Century 73-74 Tempest 71 GMC Sprint 71-77 Cutlass 73 Interchange #989 AMC Ambassador 70-2 AMC 77-80 AMC Spirit 79-83 AMC Hornet 70-77 AMC Concord 78-83 AMC Matador 71-76 AMC Gremlin 70-78 Interchange #1034 Jeepster 72 Jeep 73-83 Jeep CJ & DJ 72 Jeep CJ 84-86
List was derived from Hollander Interchange Manual