35 shot is the safest. 50 shot is not pushing it, but is a little more risky. If you go direct port, I would always be on 50. now a 75 shot is pushing it. But the Nx kit is adjustable for 35-50-75.
As for a dry kit. YOu have to have a return fuel line, which we celi owners do not have. I think you may be able to get a custom one done, but wet kits are the safest anyways. Suit yourself.