Price pfister 3-handle valve for rainshower?

I'm thinking of using the Price Pfister 801-DC00 3-handle valve from Lowes (separate hot & cold, plus a diverter typically used to toggle between shower and tub) for a shower-only application. I'd like to use the standard shower output of the valve to operate the standard shower head, and connect the tub output of the valve to a rainshower head, so that I can switch between the two different shower heads. Obviously, I won't be using the tub spigot that comes in the kit, but rather, this will be plumbed into the rainshower.

Any ideas, suggestions, or outright "don't do it's"? I think the valve body is an 01-31XA, but I'm not sure at this point.

Thanks!

diverter

I'm guessing this would be the same situation if I used a separate diverter with a standard shower valve. I called Price Pfister, and they said it could easily be done, but that there may be some flow issues with the rain shower head. I'm going to try it.