Ayuh,...... Welcome Aboard,......Another 2bbl. carb,..... is Still a 2bbl. carb,....
A 4bbl. carb will give ya a noticeable boost in top-end, not so much down low
As Scott is tellin' ya, the Vortec head swap, with a proper manifold, 'n 4bbl. carb is a worth while swap,.....
Beyond that is...