Costs to build an engine??

If you supplied everything,every nut, bolt, everything and they did all the machine work and assembly complete,,I will guess you are looking at $5000. I paid $2200 to have a 451 B stroker short block built, supplied all the parts and the block already had the machine work done.They did have to balance.That was 10+ years ago.At that time I didn't have the time, place or micrometers to do it myself.