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  1. SpeedThrills

    Holley Air Horn Question

    If I cut the air horn off of my Street Avenger 770, will there still be threads to hold the air cleaner stud? EDIT: I’ll remove the stud and see if I can see or feel down in there. And, see if the stud will thread down enough.
  2. SpeedThrills

    Good Holley Jet Source

    I'm working on my Holley Avenger 770 using this thread as a guide: Power Valve Selection: The Definitive Answer I was directed to it on my thread about taking my Duster to the track. I'm going to need some jets, but I sure won't ever need all the jets that are in the the sets that go from 64...
  3. SpeedThrills

    Holley Jet “H”

    Been along time since I’ve seen a Holley jet. I have an 89770-1 Street Avenger. The jets have the letter “H” after the size number. Does this have any significance other than maybe indicating it’s for a Holley?
  4. SpeedThrills

    Ram Air Box...

    ... By Air Inlet Systems. index.html Anyone have experience with this company/product? I don't want a scoop or cowl hood on the street/strip Duster I'm building.
  5. SpeedThrills

    Filler Neck Question

    The filler neck on my 74 Dart Sport (now a 71 Duster), has (had) a sort of baffle in it that makes it really hard to clean out. I'm guessing that the purpose of it is to prevent back splash when fueling. I took it out and was able to clean the two pieces. I figured I could slide it back in...
  6. SpeedThrills

    Filling Throttle Plate Holes

    In another thread, I mentioned that I got a little better idle by temporarily plugging the holes that I had drilled in my primary throttle blades, and cracking open the secondary blades instead. Now, how do I permanently fill the holes? Do I remember a soldering method? It obviously has to...
  7. SpeedThrills

    Very Low Vacuum

    Recently got my 360 running in my Duster. Cant drive it, LOTS more work to get there. lol Anyhow, it's 11.2:1, MP 292 508 cam, 2.02 intakes, 915 heads are ported, Torker II intake and 750 vac Holley. It's idling at 900 rpm @ 3" of vacuum. I have this PCV, M/E Wagner Performance Products –...
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