I think when choosing donor parts for a kit car, having lots of swap and upgrade options defeats the purpose. Lemme get this straight, I can use the suspension, brakes, engine and transmission from a 914. But then I have to upgrade the the suspension and brakes and swap the engine? How about if I just use the transmission? But it would probably be better to use a newer, stronger 'box, or else spends thousands upgrading it.
How about instead you start with a 914 shell and swap in double wishbones, brakes, a modern engine and a gearbox that shifts?

Maybe from a Honda donor.