Any additional infor you would like to add would be great this is for Ford Motors older 1970's and back

 

Depends on what you want out of it. For highest peak horse power, I'd go with the Demon (which is basically a modified Holley design). For good streetability, and reliability, I've run an Edelbrock carb for years. I literally took the carb out of the box, but it on the engine, and set the idle. I haven't had to touch it since in 8 years. I don't think it'd beat a Holley for power, but I sure have enjoyed mine.

 

holley seems the best to me, more balanced than edelbrocks, but i don't know a lot about demon's, i've heard good stuff about them