Hey guys,
I did get the O'Reilly Ultima starter installed and it's working GREAT. I'm really glad I upgraded while I had the engine out.
At first, I followed some instructions that another owner gave me which was authored by DPNW stating to put the red/white wire and the blue/yellow wire onto the same small post on the new starter. I did exactly that, and then connected my battery, ready to start the car for the first time since doing my frame-off restoration. The car started well but after the exhaust started to warm up I saw a bit of smoke/vapor which was probably just anti-seize burning off but I wanted to be sure so I turned off the key, however then found the starter was still spinning! I disconnected the battery which of course ended that. I waited for the exhaust to cool while looking at this thread where I see the blue/yellow is shown going to the big post that the black starter wire is on. So, I cut the small terminal off the bullet connector (blue/yellow) and put a larger ring terminal on, put it on the bigger terminal, kept the red/white on the small terminal, and re-connected the battery. Now it works perfectly.
Can anyone explain the difference? Maybe the starter the franchises were selling is not the same as the Eagle Premier starter?
Anyway, all good now but I like to understand why things go wrong.