That was an unusual V6 to say the least, as I recall it had the common crankshaft, but the throws were not common, 2 rods per each, but they were ground to allow them to be separate, which allowed them to act like a V 12, sorta, very smooth running, and I believe they were also very sought after in the GMC pickup. Hope that's understandable.
I think I hurt myself with that one, hope it was correct, Glen's brother Gene raced tq's with us, and as it wasn't secret, he let us in on it 😉. Don't ask about bore spacing, it's not doable right now.