I've got a comp-cam on a sm/blk 434" but have not installed the engine in the car yet. I also have a used jessel under the work bench, that i bough after the purchase of the comp-cam unit. I've run jessel in the past (2 pc.) and i can tell you there is no comparsion on workmanship between the jessel and the comp-cam unit, plus when i started unwrapping the comp-cam unit, i found a made in China sticker on some of the assembly parts. The one i bought does not have the idler pulley, i wouldn't buy another one but since i already it installed, i'm going to try it :?: hoping it don't bite me in the butt.
Zip.