We've been waiting for the opportunity to break-in our new Comp Cam and Holley / Weiand upper engine parts we installed on our 1965 Chevelle's 350, and that day finally arrived. To make it go smoothly, we filled the oilpan with Royal Purple Break-In Oil to ensure that the Comp flat-tapped camshaft would break in properly and safely. We then installed the engine and driveline onto the Chevelle's chassis and wired it up so we could use the chassis as a test stand to break in the engine. Here's the video of what happened!