Maybe I am lucky, but I have never had any issues with the big ol` factory Ford starters. I had one in my 74 F350s 390 with Hedman headers, my 70 428 Mach 1 with Hooker headers, my 390/428 and 427 FE powered Fairmont drag car, and currently have one on my 59s 428 with FPA headers. I still have a new Powermaster XS Torque mini starter that I bought years ago, for when my old factory starters ever caused any problems, still waiting for that to happen.