A Simple Auto Engine Conversion

wrote:
the isolation of prop loads on a crankshaft that IS
NOT DESIGNED to take prop loads.

This is the kind of problem I was fishing for in the original post --
something I hadn't heard of, but constitutes a show-stopper.

I like that two-into-one spark plug idea. If that's feasible, I'm a
LOT less attached to magnetos.

Here's an example of a Hybrid ignition that is two-into-one set up. It
is hybrid because one system is points the other is electronic. He has
an older version that was dual points.

http://www.flycorvair.com/distributor.html