Ford Racing Performance Parts Boss 302 Block and Crate Engine Program Based on the all-new Boss 302 block from Ford Racing Performance Parts [(586) 468-1356] the Boss 331 crate engine looks like a sure winner. It follows in the path of the '69-'70 Trans Am Boss 302 engine, using a short stroke and good breathing to produce big power. The FRPP Boss 331 engine demonstrates the capability of the new cylinder block as well as the outstanding breathing characteristics of the CNC-ported "Z" cylinder heads. The engine has a 4.250-inch bore and a 3.100-inch stroke. View Related Article
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