What Is Blueprinting?Every engine build should be a blueprint, which means you've got to have a plan. We don't know who first used the term "blueprinting" in the world of engine building, however it's appropriate because you want to plan your engine build, not approach it with reckless abandon. Blueprinting means you're going to check anything and everything that can be checked; then you're going to act on these findings.The first phase of blueprinting is inspection. Even brand-new parts must be inspected and measured thoroughly. Need some good examples of why you should inspect new parts?
The next phase of blueprinting is improvement. Improvement begins with machine work on the block and cylinder heads. Even if you have new cylinder heads, they should be disassembled, inspected, and machined as necessary. This is why we had Edelbrock send us bare castings for our 390. We didn't need Edelbrock's valvesprings and retainers. We had Crane's. We did have Edelbrock send us 16 valves. JGM machined the heads to its specs.
Cylinder-head improvement includes: