Hey guys, first time posting. I have a 1976 Cj7 named Fozzy. The carb recently started acting up so I took it as a sign that I should upgrade the carb and intake. I'm putting in an Edelbrock 2131 intake and 1406 carb. Following the edelbrock instructions, I picked up a felpro MS 96011 Gasket set. After a break deal of swearing, a block of wood, a BFH, and some bloodied knuckles, I managed to remove the factory manifold (evidently the prior owner tried to glue it in with a lot of RTV). The Edelbrock instructions say to install the factory valley pan and Gasket set. However, the factory pan appears to be riveted on. It has small lips that will make finding the rivets off annoying. I can't find a replacement pan (online or at local stores). How in earth do I get the old pan out without ruining it? Do I need to drill out the rivets? Do I actually need the valley pan at all? Some threads suggest that I don't need it, just the felpro gasket, is this true?