I had the same question, Warmoth told me there would be a symbol in the neck pocket (on a custom order) to indicate that the pocket had the correct angle. The LP I ordered for my son was missing it, but it showed on the invoice. Warmoth assured me it had been done, and after assembly it was apparent that it had been.
I have a tele body routed for the non-recessed floyd and it has a symbol on the neck posket to say the neck pocket is angled.
If it was a showcase body, it should have the correct angle routed already and probably will not have a symbol in the neck pocket.
Can the sales folks at warmoth and they can help you out.
V/R
Bill