Got the starter and new positive cable installed today.
Holy Schnikes!
I went from Brawr...rawr..rawr..rawr..rawr..Vroom
To Chivrooom..
This thing kicks butt. I could probably drive it home on this thing in a pinch.
Mucho improvement. I drove it to my shop 20 miles in high 80s heat and it started right up. Time will tell if it solved my intermittent hot start problem, but I have the feeling it did.
Thanks guys for the advice, I'm digging it. It's also nice to get rid of that old grungy wire and have something nice and new in there. The one there was not even the original.