Is the B1 the 8 valve or the 16valve motor? if it is a 16 valve i would go with a A6 or Y7 head and just use your Intake manifold and all of your electonics from the old head. This is a cheap but effective way to go. If its a 8 valve motor you might want to look into if the valve reliefs in the pistons can handle the 16valve head. Also since you had head piston to valve contact you might want to inspect you piston tops also.