The reason it ended up with a 750 Mighty Demon with annular boosters is I had a 650 speed demon and had bog issues off the line I couldn't get sorted out so the engine shop that built it loaned me a 750 mighty demon they had and mid range and top it where way better the bog was a little less but no worse so I picked up a new/used 750. I am starting to think vacuum secondary as my ability to tune the Demon's hasn;t been that great. I see a lot of guys runnign and liking the Holley 3310 750
