I am looking to build my fuel system and am not sure on the size of the fuel pump. Here is the background of the engine:
526CI BB , E85 fuel, say at least 12-1 CR, solid roller, indy alum heads (at least 700HP), FItech 1200HP power adder fuel injection system, fuel cell with in-tank pump (probably Holley 12-146).

I've sent a message to FITech to ask them but have not heard back so far. I was looking at the holley 12-146 setup that goes right into the fuel cell and has a 118 GPH @ 87 PSI. Seems like a lot of fuel? Is it too much? The smaller one is 67 GPH @ 80 PSI. I realize using E85 I need more fuel, but I don't want to overdo it (or underdo it either). I want to use the in cell pump setup, not an external pump.