want to upgrade motor

I have a 1978 b1600 with a 2ltr ma Motor and box. Also I think a hilux diff. What kind off v8 will bolt up to this box. Also would need to change brakes in the front aswell? What kind of modification will i need to do?

No V8 will bolt up. Even if there was someone who made an adapter kit, that transmission would fall apart behind one.

What would you recommend?