Is the AMC 304 a good engine?
Sarah Oconnor
Updated on February 28, 2026
These engines had rectangular port heads that flowed well, and AMC’s new V-8s were known for making great power with very little headwork. Interestingly, Jeep never used the second-gen AMC V-8 and instead sourced a Buick-derived 350ci with a very flat torque curve for 1968 until 1971.
Who built AMC engines?
American Motors Corporation
AMC V8 engine/Manufacturers
Who makes 304 V-8?
AMC
The 1971 “J” Series was the first to receive an AMC engine (the 304), replacing the very capable and benchmark Buick Small Block V8. They began to phase their engines into all Jeep models in the following two years.
Is a AMC 360 a big block?
The Ford 360 is a big block engine. Chrysler has both big and small block engines too, and their 360 is a small block. AMC has no big or small block V-8 engines, whether 360, 390, 401, they’re all the same block and bored out differently to one specific size.
What kind of engine does an AMC 304 have?
AMC 304 (5.0L) 8 Cylinder Engine Parts. The AMC 304 V8 had a displacement of 303.92 CID which produced 210 hp in 1970-71 and was built starting in 1970. Later models produced less power from the factory, going down yearly. 1972-78 models were rated at 150 hp.
What size pistons do I need for an AMC 401?
This forged AMC 401 piston set is for use with a .030 oversize bore of 4.195 inches | standard stroke crankshaft of 3.680 in. | rod length of 5.858 in. | wrist pin size of 1.000 in. | Compression is 9.5-1 with a 58cc head chamber 4032 forged aluminum with ArmorGlide skirt coating.
What kind of engine does a jeep 304 have?
The AMC 304 V8 had a displacement of 303.92 CID which produced 210 hp in 1970-71 and was built starting in 1970. Later models produced less power from the factory, going down yearly. 1972-78 models were rated at 150 hp. It was rated at 130.5 hp in 1979. It was an optional engine in 1971-1981 Jeep CJ-5 and CJ-7.
What size crankshaft does an AMC 360 have?
This forged AMC 360 piston set is for use with a .045 oversize bore of 4.125 inches | standard stroke crankshaft of 3.440 in. | rod length of 5.875 in. | wrist pin size of .930 in. | Compression is 9.5-1 with a 56cc head chamber 4032 forged aluminum with ArmorGlide skirt coating.
