338 c.i sbc. Only 15 nights since new. This engine started of with everything new, including GM block. Scat light weight crank, scat rods. Forged pistons, Dart heads. Has roller rockers with new springs. I have the Dyno sheets, and build sheets if anyone is interested. Always ran synthetic oil, changed every 3 nights. Only reason I'm selling is taking some time off from racing. Contact Brett at 928-210-1411.