I will try to clarify.
The swap is going into a Fiat X19. right now I have about 1.5 inches from the stock manifold to the firewall. Just beyond that firewall is the fuel tank that is being relocated up front. That gives me about 4 inches more room. If I have time during lunch, I will measure the distance from the head to the stock firewall, then add 4 inches to find my max space I would have to mount a turbo. I guess what I am looking for is information on what might be the most compact turbo/manifold setup for a b16 that I can find. If I cant find one that fits in the space I have I will have to start looking at a supercharger instead.. Thanks! Odie