Which gearboxs is the best to use on a 350 chev out of the w55 or w58?

Mate I haven't used either because I have never put a 350 in my car because it would eat my w58 for breakfast. I figure the point of having a 350 is to have power and if you have a w series box it can't hack the torque. The r154 box would be the go, but they are costly