Yes, and you can buy them that way. The Uniflow inlet and overflow are then remotely mounted and hooked up with a bit of fuel hose. This works just fine, but you do want the remote Uniflow tube to be above the top of the tank.
Sometimes there is a question about which tube is which, but otherwise, it's a good plan if you want to slide the tank in/out through the engine bay. If you like to remove your engine to shim the tank up/down to adjust engine run during insides/outsides.
Kinda depends on how much your engine of choice vibrates. If you have a smooth running engine, dropping the tank out the bottom (top if an upright engine) is less hassle, but the remote exterior tubes are still a good thing. Different strokes.
Steve