I run the same cam in my 440 Roadrunner and feel your pain. First thing take your idle vaccum in gear and divide it by 2 and that's the power valve you need to run, this is off the Holley web site. Get used to a rich idle you can't lean it out enough. This cam needs a 1000 rpm idle, the timimg spec's for this purple shaft is around 32 to 35 degree's at 2200 rpms. You will have to put lighter advance springs and let the distrubator advance manually. Hang in there you will get it.