I bought this old F800 with no engine in it. I bought another F800 with a good engine. Pulled the engine and junked the truck. The engine sat on the ground for 6 months, finally got time to put it in my truck. It starts but runs like crap. Spitting and sputtering. I know the Motorcraft Holley's weren't known to be the best and especially after 6-8 years of sitting, what are the possibilities of this carb being any good. Some other forums said to take the Holley off, throw it away and put a Edelbrock 1405 on it. Any suggestions??