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  1. ZZ502 BBC crate with 870 Holley

    Anybody else running the ZZ502 deluxe chevy crate motor, it comes with a 870 CFM Street Avenger Carburetor, electric choke and vacuum secondaries. I noticed I wasn't getting much of a boost from the secondaries , so I did the paperclip test, checked for binding and then went to the lightest...
  2. ZZ 502 HR Cam Suggestions

    I am need some advice on picking a new Hyd. Roller for the 502. This will be street driven and will have a 150 N20 plat system. The engine is at the machine shop getting freshened up. Block is being decked to zero New Scat Forged Rods GM Performance Aluminum Heads flat milled 0.030 to bump...