This piece is a very compact 1-wire 18 amp race alternator sold by Riolo out of Sacto, CA.
It puts out enough juice to run any MSD ignition + whatever elect. (fuel pump) items that are on a race boat (or car). It's a very trick piece and cost over $500.00 new. I will sell it for $300.00 FIRM (inc. shipping cost anywhere). Don't try to lo-ball me on this one cuz it doesn't take up much room on my shelf. If you know about these alternators you also know this is a good deal. Jocko