Best thing to do is what @MusbJim does: Buy a basic Speedster with a nicely built 1915 air cooled engine, 4-wheel disc brakes and the transaxle of your builder's choice (after you tell him where and how you expect to be driving it), pick the wheels (Vintage 190s are very in) set the stance and
DRIVE IT ALL THE BLESSED TIME.
Beware long technical threads on this (and other) car guy forums hashing out the merits of various carb sizes and brand names, fuel injection and turbo solutions and/or gear ratio choices. They will rob you of precious hours of your finite life, and the men who make them are weenies* who will attempt to convert you to their garage-bound, joyless lifestyle.
Be like Jim. Buy a cool-ass Speedster and drive happy.
*myself very much included.