Thank you for your help. Now that I think of it - I have seen the "alignment" studs before. The front exhaust manifold hole is filled with a bolt. The rear, I can place a bolt in the hole in the exhaust manifold hole - bit there doesn't seem to be any threads there. Tomorrow - I'll get a mirror out and get a bright light and see what I have there. I did think about the exhaust pipe donut being burnt too. Finally I did think about the resurfacing. All good thoughts - I appreciate your time and efforts. Stay tuned... Tim-o