I put a performer cam in my freshly rebuilt 350, To put it mildly it is a dog, disappointed in the performance is an under statement. My question is, do you have to use edelbrock timing chains with their cams? When looking at their Web site it says DO NOT USE STOCK TIMING CHAIN under each cam. They list different part numbers on chains for different cam sizes, was wondering if they grind their timing gears to work with their cams? The guy that built the motor is a respected builder around here, he said he put in a roller chain and degreed it, should not be a problem, so I called the tech. for edelbrock He said with a stock chain I would not be able to advance it enough to make it work right, I tried to advance, it did run better but pinged badly. Have any of you had any experience with this?? Thought I would ask before I tore into my new motor. Any help would be appreciated. :ears I know there could be other reasons for the performance problems but not sure what, have put in new distributor HEI , and carb works good. Q-JET.