IN this video I give up an old secret on modifying the SBC Oiling system. By purchasing 4 extra long drill bits you can greatly change the oiling properties. As far as I am concerned, all Street engines need this done, and I do it to all my engines that make over 300 Horsepower. All BBC's use "priority main oiling" and most aftermarket blocks (Dart Little M) do to. This relates to the old "427 Ford Side Oiler" and what it done for them. IT takes a LOT of work, with the grinding and drilling it would cost you HUNDREDS of dollars to have someone else do this. I will try to get a better detailed POV on my website with lots of notes. www.headbytes.com and phone is 6152127168. Hope you DIY guys out there like this, I had to find out the hard way how important this was years ago...JUST DO IT!!!