High 12's Shouldn't be a problem Dennis. Actually went with Chris when he originally bought that motor ( Thought it had aluminum heads on it at the time? Land yacht ran high 12.80 with a similar set up. Pic = modified 3310 I ran it the time.
He told me he ran it just the way I picked it up. Maybe he has the Aluminum heads on his 416?
Anyways, I hope I can make this pig run as good as yours.
