If you do it right, and want the least amount of headaches down the road:
Rupert Carb
Enderle belt driven fuel pump
Vacuum pump (4-vane doesn't work as hard)

I still have my tank in the rear but I by-pass to the bottom of my pump so there is no return line. I get 0 water in the oil. I have no blow-by, and I feel real bad about changing the oil mid season because it looks so good.