Yeah Griffin doesn't have one either. I need more cooling which is why I want an aluminum rad, so no interest in switching to a shorter 18" rad.
The truck has a 505 in it that made 549 hp, AC will be used and the truck is on 37's so I want to get as much cooling into as I can.
A rad shop measured the tanks and said they can't add any more core thickness than what I have, I may end up buying a buy an LS Swap style rad for it.