Fits 302 production and Ford Performance cylinder blocks. Stock 2.1232" rod journal diameters. Use with M-6200-D50 "Sportsman" rods (5.40" long) and 1.090" CD pistons in standard 302 block for 347 cu. in. Features: Lightening holes, Rounded CW leading edge, tapered trailing edge, Rod and main journals are nitrided and polished. Requires custom pistons, rods and balancing