I have a Hi-Po 289 with a four barrel carb. I used to have a Holley carb on it when I first got it going. I think it was a 500cfm. I hated that carb!!!! It was always flooding badly. I was always having my dad adjust it, almost daily sometimes. Holley carbs don't like to sit around because the gas gets to the diaphragms. My dad got soo tired of adjusting it for me, he bought me a new Edlebrock 4 barrel without me knowing it until he handed me the box. I still had to pay for it though damn it!!! That is the best carb manufacturer, I think, and I will never go back to a stupid Holley carb. I like Motorcraft too. If you are looking for headers, I would suggest, either, Hooker or Hedman. I have Hooker headers on my 1960 Ford panel truck, they were on there when I bought it, and I think they are great. My 1968 Cougar XR-7 has Hedman headers. Those were my Christmas present in 2002. I noticed a big difference in the throttle response and I gained some horsepower too. When you get headers though, send them off to get them ceramic coated. It is worth it!! The coating keeps the engine bay temp down. After 7 minutes, I can touch my headers after I am done driving it. It also increases horsepower and they have different colors. Plus, the big reason is that the headers will probably last longer than your car with the coating which is kind of a bad thing. Lets hope your car never rusts away. It cost me about $200 to get them shipped off and coated. It is worth it big time. I hope I have helped you a little bit. Later
MeanMerc68