a Holley Performance / 500 CFM 2-Barrel Keith Dorton Series Carburetor - Not Legal for Street Use and Not Legal for Sale or Use In California On Any Pollution Controlled Vehicle http://www.autozone.com/R,2535379/s...uctDetail/shopping/accessoryProductDetail.htm
I wouldn't try to run that carb on the street, especially with a stock manifold under it. The manifold would become the restriction, and I think that carb would just feel soggy, as in not crisp and responsive. You would do so much better with a 600 cfm four barrel with vacuum secondaries on an otherwise stock engine. It is a better match and feeds the motor what it needs, when it needs it. That other carb would be "all at once". Shop the swap meets ... manifolds are usually OK used as long as the water passages are still alright, and it is easy to get aluminum and take some weight off the front end at the same time ( about 30 lbs!). You can get a used carb and have it rebuilt and you would come in at half the cost of that carb. I did this to the original 302 in my Comet. It woke that motor up. Factory 80s Mustang GT aluminum manifold, 1 inch spacer, and a Holley 600. Made the 4 wheel drum brakes feel that much more scary and inadequate.
I would never buy a brand new carb, just because it's so cheap to rebuild them. If you're intimidated by the idea, find yourself a used Edelbrock 1406 or Carter AFB. Rebuilding those carbs is so easy, you don't need any experience to do it. Just take it apart per the instructions in the kit, clean everything up the best you can, put it back together and it will run like a brand new carb, all for the price of a $30 kit plus whatever you paid for it initially. I think you could expect to score one of these carbs for about $100, maybe $200 max. Then tuning that carb is easy too. Get another $30 kit and you can change the rods and springs to make it leaner or richer, and tweak when it comes off cruise/idle and into power mode, all very easily. I can literally keep a Torx screwdriver in my car, drive it around, then pull off the road and change these rods and springs in under 5 minutes. Very easy.
Yeah, but that's a 500cfm 2-barrel carb with no choke, going into a Colorado car where they do actually have winter and could probably benefit from having a choke... And it's $450. For less than half that you can have a 600cfm 4 barrel with electric choke fully rebuilt and learn something about carbs along the way. 'Course it will need an intake manifold, but that should be done anyway.
The emmission laws are Federal.... $20000 fine or 5 years imprisonment for removing, modifying or disabling any emission control installed on the engine at the time it was purchased new...... The states that have testing are required to report to the Feds and they will not allow the car to be tested with mods like that. A rebuilt (or new -old stock) carb from a 1969 351W will give better street performance and better mileage than the big Holley 2bbl on a stock manifold.
i dont know about your stats but in california, as long as your ride is 75 or below... your a free willy pretty much. besides these cars aren't new anymore
gas caps are checked to make sure they dont release gas vapors. the carb asked about it this post is intended for use in race cars that have rules restricting them to two barrel carbs no biger than 500 cfm. that carb is desgined for only that type of use. its not made to cruise on or run cleanly. its made for the demands of roundy round racing or road corse racing. if your looking for a good two barrel then go with a factory ford two barrel off of a big block from the late 60s early 70s ford truck, or from the mustang as sugested earlyer.
