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. GM Chevrolet, Chevrolet Trucks Products with 307 CI V8 (1968-1973) Cast replacement piston. 3.875 Bore, rings 5/64, 3/16, Pin Dia .9275
