Been having a full throttle stumble since I bought this truck a month ago. I flushed tank, installed eBay electric choke 1 barrel, installed new fuel pump, installed HEI along with the firewall to distributor rewire. Always starts like a champ runs smooth throughout throttle except for full throttle. Yesterday while getting parts at orielly it wouldn’t even click to start. So I used there battery jumper and got home to check. Low and behold the 3 wire alternator to a crap. So this a.m. I decided to install a 1 wire setup. Mostly for being simplistic and less wiring. So I bought a 61amp 1 wire, and ran new 10 gauge wire from alternator to starter post as I like to no clutter up battery. Thing runs the best it has ever ran. Wish I would have caught this early on.
