have 2 one barrel carbs off ('53 GMC and '58 Apache), ready to order kits & rebuild. Any kits to avoid? Any kits worth paying extra for that work better/have better parts. both of the under carb rubber "isolators" or whatever they are, fell into chunks in my hands, so they come with rebuild kits or separate item? It's like a little rubber donut about an inch or so thick, I guess meant to slow down manifold heat to the one barrels (rochester). THANK YOU!
