motor runs great at times and sometimes it want crank
Hi, i have a 1971 Ranchero with 351C and I have replaced the cam with a mild one somewhere around 509 lift. replaced intake and carb (600cfm) and headers. The car runs like a champ at times and cranks right up. but other times it has a hard time turning over and runs really rough. I've adjusted my timing a many of times and still not real sure what is wrong. Any help will be greatly appreciated.