Just an update. Make sure to use equal length line after the T-s if you do this. I reused the stock hard lines and ended up going lean on one bank and rich on the other causing high EGT spikes and rising coolant temps during throttle transition. So to do it right, make sure your feed and return lines going to each rail are equal length (which means do not re-use any of the stock hardlines). I would recommend not using soft line either, use -6 AN lines if you can or just the steel braided hose and bard fittings.
I don't want to remove the manifold again, so I am just buying rails (the new design of the AP rails which are much like TXS rails).