Who builds reliable race/street engines?

Marcohotrod said

Nats wants everything - my damper,crank sprocket, oil slinger, rod bearings, rods, pistons, pins, rings, crank, flywheel and bolts

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I see you picking apart the balancing methods. So to your method...companies should not be able to sell harmonic balancers correct? every rotating assembly on the planet needs balanced down to the oil slinger (which many don't even include on their engine builds)
there are lots of engine companies selling short blocks, long blocks, etc. they are all inadequate BC they don't balance down to crank bolts?