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Edelbrock Performer/Holley Avenger Systems

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 77GMC, Feb 12, 2003.

  1. 77GMC

    77GMC Newbie

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    Location:
    Victoria, B.C Canada
    Have you guys/gals had any experience with these systems (carb/manifold/camshaft) that say everything is matched without you having to do the guess work (trial and error)? My question is, are these kits worth looking into and what sort of gain will you get (from say a stock 77 400ci )? Is there a better way to go? /forums/images/graemlins/wink.gifThanks! /forums/images/graemlins/k5.gif
     
  2. VitaminK5

    VitaminK5 Registered Member

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    Make sure of the kit you get. Some heads need to be milled for fit which raises compression...issues. Notching,shortening all machine shop work. Remember that strain is getting passed along the line too. Some systems will jump you up 150+ horses. How's the crank and driveline? Open the exhaust and then start pushing more air in. Suumitracing.com techs will get you there as well as Jegs.com, Good luck.
     
  3. 77GMC

    77GMC Newbie

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    Hey thanks! The engine and tranny overall seem pretty tight. Ebay seems to have tonnes of these for pretty cheap too. By the way, what sorta internals came in these engines...cast/forged? Is there a good site to describe the internals for these engines? Thank you again in advance! /forums/images/graemlins/grin.gif /forums/images/graemlins/k5.gif
     

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