Is planning on buying a twin carb manifold from a B20(0) will it fit my B19??

Have changed it, but damn I had problems, with the gasket to the head, the water kept pouring out But now it runs;)

Can anyone give me a link or tell me how this is done the right way. Have loosend the alternator, taken of the cam belt cover, but do not seem to be able to reach the bolts keeping the pump in place.