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  1. harvenator

    zinc oil useage?

    Royal Purple HPS (HI performance street) has extra zddp in it. I run it in my Harleys.
  2. harvenator

    increase HP on a 273

    Call Charlie at Camcraft Cams Toll Free (800) 426-2261. Tell him what you have and what you want and he can tell you exactly what you need. He'll grind anything you'd like and is exceptionally reasonable for cam and lifters. I got a cam and lifters for (solids) for $200.00 from him.
  3. harvenator

    273 to 318

    Your 273 can be worked over to put out much more than the 318. Over bore by .040 brins you to an even 300 CI. Camcraft will grind a cam for you with solid lifters for about $200.00 total and a little carburetion will get you some impressive performance.
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