In reference to the original post the word "blueprint" is used as a trade name for an engine re-manufacturer. In the world of performance engines the term "blueprinted" is not just assembling an engine package with off the shelf parts. Each component is massaged, tolerances are set to a specific number. The deck height is machined to a precise spec, the lifter bores are all checked to make sure they are square and perpendicular. Combustion chambers are all measured and adjusted to be the same. All valve heights are set to exact measurements. I'm sure that I don't have everything listed. Its for sure a step up from a factory built engine or even a engine that is re-manufactured by a company that specializes in engine building.
