Don't worry, Jerry, we all understand very clearly what is driving you. Many will read your post with the wry amusement of equally driven souls and thoroughly relate to your attraction to Rusty Iron.
For myself, I do like exposed crank engines, especially Ruston-Hornsby and Crossley which seem to me to do very well in the exposed bits stakes. I've an Amanco 2 1/4 somewhere & a Crossley 1075 with suitable dynamo which I have grand plans to clear a space (HA!!), build a concrete base & run regularly for my own amusement. Frankly, I'll likely keel over into my box before I get it done having rather too much else on my plate for the next thirty years or so - but there, we're all gonna live for ever, aren't we?
Yus mate.
The only ancient engine I'd actually buy if I could afford it is a Gardner Model 0 - very pretty.
But really, being a motorcycle mechanic/builder/rider for the better part of fifty years, air cooled engines call to me more & flat twins especially. Become a bit of an obsession, I suppose - I don't go much out of my way to find them, but usually buy new examples if they cross my path at reasonable prices.
I've had Lister D's, Wolseley WD's, Stuart Turner R5, P55's & sold them on without a tear. Last year, I had a bit of a clear out and sold a couple of tarted up Iron Horses & an ALCO Featherweight on eBay but I still have other, better examples lurking around the workshop.
What am I going on about? Well, I think you buy what comes up & keep what calls to you after a few weeks. A Petter A1 (I've got one of they, too!) might not be with you for ever, but they all have their niche to fill in the heart of the engine man ;o))
Finally, any old bit of wire will do to connect hole to terminal & fire it up - nothing magic about HT cable. Good plan to fit the right stuff before exhibiting though ......
Regards,
Kim Siddorn,