Do you degree your cams? I have had very good luck with the old 484's & 509's
Not all of them. I've tossed them in straight up on a Cloyes chain many a time. I have seen guys try running them both advanced/retarded before, but they were starting from a timing set stamping, not actually degreeing the cam at all. Some have worked, others have been pulled and degreed, the stock "straight up" position isn't always "straight up".
The only one I installed was the 509 in the dart. That went in straight up. and I'm sure the others did too.
