Who builds reliable race/street engines?

Marcohotrod said

rotating assembly - external Johnny - does that mean externally balanced? if so it should include a damper and a weighted flexplate or flywheel!

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We can include a damper. If you view our website, or the BluePrint section of the forum you'll see the new BPP360 damper.

If we balance a crank, rods, etc. To a spec, then the need to do it as an assembly isn't needed.

IMO its a misconception that things that apply to 10,000 rpm builds apply to all engines. It results in added cost with little gain.