timing help

15 degrees initial , 35 total , No vacuum advance. One medium spring take the heavy one out . close up the inside of the advance slots form 1/2 that they com stock to 3/8's. This is what you need to do when installing any cam with greater than 450 lift. Stock came are 444 lift . 455 for 68 340 4spd. and they came with an altered advanced duel point distributor. I do this on all Cammed cars that come to me that have your issues with overheat , Idle in gear, no low end powre . or breaking up on the high end. This will get you where you need to be with ignition timing. I can do distributors for $15 dollars plus shipping. Steve