Is a surge tank needed with Weber carbs?

I had planned to use a simple T connection between two tanks feeding a SW 240a fuel pump supplying the quad Weber induction on a 289 engine. Do the fuel bowls on the Webers hold enough fuel to eliminate the need for a surge tank?
If not, should the main tanks feed the surge tank individuall through separate check valves, or be T'd together and the surge tank fed through a single check valve? Off hand, I'd think for accident safety each tank should be isolated from a surge tank by it's own check valve, but could the extra plumbing and connections have just the opposite effect??
 
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