Blueprinting an engine consists of several machine shop operations including but not limited to:

Bore & hone cylinders (usually w/Deck plates).

Re-size connecting rods (big end & sometimes small end).

Turn & Index crankshaft.

3 angle valve job cylinder heads (to a specific width & place on valve face).

Fitting valve guides to a specific clearance.

Setting up valve springs to the right installed height & pressure, both open & closed.

Surfacing block and cylinder heads straight & with the right RMS finish.

Race engines require even more blueprinting----such as; cc'ing heads, machining for exact deck, block clearancing for crankshaft, & cam to rod clearance, porting & polishing, shot peening, heat treating,---the list goes on & on.