I bought a used block and had it cleaned , checked and cam bearings installed. Nothing was done to the crank or pistons except for new rings and bearings. I replaced the timing chain , oil pump, intake, carbureator , fuel pump, water pump, distributor, plug wires and plugs. I also replaced the cam with a Lunati, I got old heads that were ported and polished and added new valves and roller rockers. I ran headers back to a new exhaust and installed a new radiator and electric fan. It ran before why not now ?