sleeveless block, 3.901" boreIncludes: (1) HCRF261291 Main Bearing Set, Standard (1) HCRFFPN6008B Overhaul Gasket Set (4) HCRF161382 Pistons, Standard (1) HCRF86539359 Piston Ring Set, Standard (4) HCRF261281 Rod Bearings, StandardThe HCRF73342165 Inframe Overhaul Kit, Ford 172 Gas fits equipment brands such as: Ford