1. Blue printing is essentially making sure that everything inside the motor is at the exact factory spec rather than in tolerance. Balancing is what it sounds like. The rotating assembly is spun up to whatever RPM and weighted to spin more smoothly. You won't need to balance a D-series up to 10,000 RPM because you're not going to rev it that high.

2. Not gonna work unless you rework the flanges to fit.

3. Not that I know of. But you want the crank, rods, pistons, flywheel and crank pulley all together.

4. Intake or exhaust manifold? I don't believe skunk2 makes a D-series intake manifold if that's what you're talking about.