For budget or stock-style rebuilds, it's hard to beat the value of Sealed Power cast pistons. They are made from high-quality aluminum alloys and feature a carefully controlled casting, heat-treating, and CNC-machining process. And, because they're designed and manufactured to exceed OEM specs, they'll provide improved reliability, performance, and a long service Life. (1970-1993) AMC, American Motors, Jeep 360 V8 Bore 4.080, Rings 5/64-3/16. Pin dia .9310.