Well... I determined that the Pertronix unit was indeed bad.... I changed the original dist back to points and it runs fine... But I also think the ign sw was weak... Anyhwoo... I called Summit, since the purchase was previous to my online purchase history...Warranted for 30 months.....Guess when I bought it ??? 3-3-14.... Yup..:BangHead::BangHead: Now 32 mos old... No help from Summit. Sooo... I called Pertronix directly and explained that this is a project car, and the part sat on the shelf for 24 mos... I understand, he says... No Problem... We will warrantee it for you... Gives me a Return Auth. No. and says they'll replace or fix it right away, as soon as they get it... :thumbsup: :thumbsup::thumbsup::thumbsup: