Have a problem that i have not figured out yet. 1967 Camaro bought with crate 350, turbo 350, has HEI. Have had car over a year now, seemed starter was going out, did not know how old it was so changed out starter,selinoid. seemed to work good again but than started having starter problems again. Sometimes it would start, sometimes had to use screw driver, if it "bumped" over just a little it usually would start up. Starting to use screwdriver more often so installed another starter,selinoid. Same thing, started good than started having to use screw driver to bump over a little. Today did not seem to want to bump over or start. When installing last starter was looking at wiring figuring that possibly old wires might be at least part of problem, they seem o.k. but did notice another small [yellow] wire with eyelet tucked back from wiring. Did not remember this wire when removed starter. Thought maybe because of HEI did not need???? Without this wire on starter did work before. So..........does it need this wire? Only 2 wires on starter now, small wire and new, bigger cable going to battery. Could it be ignition switch? Do not think it is neutral safety switch, but could it be? Wife told father in law who is a retired mechanic and he mentioned something about nose of starters, making sure it was for auto. etc. I am kind of guessed out, sorry so long but wanted to give as much detail as possible. Am not driving it right now because do not want to get stranded! Thanks for any help or insight you can give.