Who builds reliable race/street engines?

Caco - do U know what an externally balanced assembly is? companies should sell dampers, and if we can throw it on the assembly and a flywheel or flexplate (needs bolts) at balancing why not - especially on an EXTERNALLY BALANCED kit
You're insinuating its REQUIRED in your other post. Its Not.
If you need a replacement flywheel, balancer, whatever, do you tear the engine down and rebalance? No...b/c the flywheel is already at a spec...be it 340 balance, 360 balance, etc. I understand exactly how it works, and I fully trust that a company producing 50+ engines a day is well beyond capable.