Jameschevypickup50 You might take those end pins out and screw a bolt in to help hold things. Idone a seat (valve) job on my 48 2 ton assembled head,and manifolds on the bench then with a helper put the whole assembly on the truck. Used a 2x4 to carry. Be sure your alignment rings are not holding your manifolds off. Make pins with slots,hacksaw, scew in with scewdriver,might even slot the old ones. On those rings it's a temptation to leave those out but if you do later you'll hit a chuck-hole and manifolds will shift engine will start missing--vacuum leak ! good luck
