Last year, after the motor was hot from use on my 66, I would turn off the truck and when I went to restart it the starter would turn over very slowly as if the battery was low. I took it to my garage to troubleshoot. First I tested my battery and alternator and found it to be charging well without problem. I used the correct size wire when I built my truck and I checked the connections where I coupled wires together and replaced them. I even checked that all grounds were secure. The problem persisted and I would either just push start the truck or use the starter (the truck starts so well that often even the slow moving starter would actually bring the motor to life.) At this point I figured that it must be a bad starter. I took a good starter from my 65 C20 and installed it in my 66. I took it for a test drive and yet again, the slow turning starter problem persisted. My last try was to replace the ignition switch which, of course, yielded no results. Eventually the problem had went away (I assume the cool weather as winter set in caused it to work better.) Today, after returning from a 200mile trip in my 66, the starter did the exact same thing as it used to do. I am still able to drive the truck as I have always been able to start it but this is not something I want to tolerate. I am running a 350 I originally had a 327. Anything you guys can think of would help a lot, I know you all have had much experience and hopefully can help. Thanks a lot, Dellman.
