the eq(vortec style) heads were bare .after he matched them to intake he put them togather ..i had my own springs and valves,guide plates,and studs he supplied the retainers , locks and valve seats....that price for balancing is for external balancing of crank,rods,balancer and flex plate .....clearancing the block, and the balancing i have not got done yet ....bcause i got to order balancer and flexplate from summit ..........as for putting it togather ..they(NAPA) told me they would put it togather and tune it ,let me hear it run for $450-500.