A/C water chiller questions

[Thick8]

So after looking into all of the options available to me here, I've decided on a water chiller because it will be totally silent and I have the A/C unit. I'm going with a simple window A/C unit with an evaporator water bath like DR_DX made. The unit will be outside the house with the water lines running up through the floor to the computer. My question is can I run 1 large diameter hose and then split it into 3 smaller hoses to cool my 8350 and 2 290's? I'm going to use a pond pump to move the water the 20 feet to the hose branch so water flow will not be an issue. Should I be concerned about an imbalance in the flow restriction of the blocks? I intend to use an EK extreme EVO CPU block and the Alphcool Hawaii GPU coolers with the active backplates.
Thanks,
John