Good answers, folks! I'm glad to see a few people actually understand precision engine building. The term "blueprint" has been hijacked by places that barely meet OEM standards in a lot of situations.
My precision engine jobs start out with a line bore and a very slight block decking job to assure everything else that gets done such as cylinder boring is exactly square. Then once all the connecting rods are reconditioned to exactly the same center-to-center length there might need to be another decking job to get the right deck clearance. All bearing clearances EXACTLY the same, even if individual crankshaft journals have to be polished to slightly different diameters, all reciprocating parts weight matched to 1/10 gram, then spin-balanced, camshaft degreed, and a huge number of other precise buildup operations. Most clearances will be wider on a brand new race engine than the ones on a 100,000 mile street engine. It's designed to go very fast for a very short time- - - - -who cares if it rattles like two skeletons copulating on a tin roof, or uses a little oil?
Then, after 1,000 laps or so around a 1/2 mile asphalt track, or about 800 on dirt- - - -do it all over again! Doing race engine stuff on a street engine would be horrendously expensive, and totally unnecessary!
Jerry
