Similar deal, cross ram on -1 Indy heads. I just used a normal -1 valley tray. this left an air gap between the manifold and china walls. Rounding the bottoms of the outer carb stud bosses on the cross ram makes removing Indy cast covers easy. For what its worth the Indy cross ram makes WAY more power, 50hp minimum from 4000 rpm up. Adds 1000 rpm to peak as well.
Doug