1977 403. Built by M&J Performance M&J PROFORMANCE BUILT ENGINE 403 Olds .024 KB Pistons -.030 deck Cometic Head gaskets .040 Ultradyne Cam 231/239 .517/541 LC 109 Cloyes Timing chain #2 cylinder heads, street/strip port, 2.072/1.625 Milidon Valves 64cc ARP Main studs and straps ARP Head studs All Clevite Bearings Edelbrock Performer Intake Full block machine, bake, blast, bore, hone, deck, line hone 330 Crank grind 10/10 full rotating assembly balanced Parts I added: Flowcooler Water Pump Robbie Mac Fuel Pump Holley 750 Vac Sec. Carb 160* Thermostat Hedman Ceramic Coated Headers TH350 Trans Hughes 2500 Stall Converter 3;23 Limited Slip Rearend