Re: Mini starter
I followed the recommendations above got the Advanced Auto mini-starter for a Chevy 454 (P6449S). The fellow at the counter warned me he wouldn't take it back if I got it dirty/scratched since it didn't match the original size I turned in, but luckily no problems and questions about core sizes. The mini is actually much easier to put in after monkeying around quite a bit to pull the old unit out. Works fine and sounds different. There's just one extra hex nut wire connection on it from the motor housing, looks to be ground? which I didn't connect. Assuming I'm ok as the original didn't have it?
Other reason for my post as FYI, I thought my ignition wire was close to shot but all wires and plastic cover tubing looked fine, just couldn't always start right after going for a longer ride. Thinking it over during the swap process had also been having an intercooler leak so that may have cooked the solenoid/motor insulation last month. So also replaced some intercooler fitting barbs routed through the fender in the process and hope to be ok.
Anyways, ministarter seems be good option, after hassle with original sized unit.
Pete