gm splayed cap block gm steel (not cast )crank manely rods 5.7 manely pistons .125 dome all balanced bearings are 3 races old rings have 20 races block has one sleeve never problem roller cam 590 lift crane lifters and roller rockers 1.5 int ex has steel dart heads 2.05 1.6 ss valves with titimum retaniers arp head bolts victor jr intake champ 8 quart pan melling 55 oil pump been spare motor used off on for three years 3000 near terra haute In 812 381 2272