I thought I would add a little spice to the thread.
On my '31 "A" roadster I run a Delco-Remy 935-C ('35 Chevy truck)
genny.
A few years ago I found on eBay an adapter bracket to do this. On the original box it states: "For real service use a bigger generator on your Model A & AA Fords". I believe it puts out about 5 more amps then the stock A generator. The cut-out is the correct Delco one and I also added a fuse. To
help protect the system from the headlights in case of a short.
Bob-A