I have no personal experience regarding this topic, but from what I've read, you will regret eliminating the balance shafts within 10,000 miles. My only experience with the silent shafts is them being out of sync, and the vibration it caused.

I wish you well on the (beautiful!) rebuild, but you might have engineered a fatal flaw into the rebuild by eliminating the shafts. Time will tell, and I trust that if there ARE ill-affects, you'll report them here.

As today is my last day on the internet, I'm glad to have gotten the chance to see the photos. I hope to post a few more, myself, before disappearing into the real world. You did some wonderful work, and I'm sure you'll be very satisfied with your beautiful truck.