Edelbrock Heads And Aluminum Manifold Upgrade

I had trouble finding a source for the OEM style rotators. It really helps to have a good counterman at your local parts house. We need to support our GMC vendor's but we also need to keep our local independent parts house and hardware store in business too. It seem that it takes a global village to maintain a GMC. Eventually he found that the RC-140 rotators (UPC: 6-46997-37594-5) are the ones. The Carquest number is HTC-RC1408 for a set of 8 (two sets needed).