Well, I won't be much help here, but I can offer up a couple of tips. The upper tank on a poly radiator has the nipple in the center. On big block radiators, it's off to the passenger side. I'd probably try the poly upper hose (it's just an "L" shaped hose) and see if that works better for you. And maybe try a poly lower hose too? I honestly don't know if there is a difference in the lower tanks. With the Corbin clamps, it can be difficult to get a good seal sometimes. In the past, I've put the Corbin clamp on, and then put a regular screw clamp on right behind it. Drive it a week or two like that, and then try removing the screw clamp. It's worked everytime for me. Be careful how much you tighten the screw clamp though. Too tight, and there will be an imprint on the hose when you take it off. Houston '64 Plymouth [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. This email was sent to: arc.6265@xxxxxxxxxxxxxx bSONJP. Or send an email to: 1962to1965mopars-unsubscribe@