My 2 spare motors came with a lotta spare parts, including a generator and an alternator.When I first got them I held the alternator and upper bracket up to the block and it didn't seem like it went to these motors. I thought the only lower bracket was for a generator.
Since I need to do some wiring I decided to upgrade to an alternator. The one that came with the motors was externally regulated. Not what I want but it is what came on these motors so I took a closer look. The lower mount was bolted to one of the engines!
I dunno how I missed that but good for me!
Then I peeked under the hood of my 63 Chevy...
It had a 10si!
Now I just need some hardware, a belt, and some time with a soldering gun and I will be set!