Mike,
Never even thought of a rollover valve. Good call. Any idea where to get one?

I did consider the stake pocket, since the vent needs to be 18 inches above, but did not know how to do this. Was hoping someone here had done it.

I have never installed the bed yet, so maybe this will be obvious while I am doing that.

Thanks for the advice,

Jim

1957 Chevrolet 3100 Stepside
235, 3-speed w/OD
In the Stovebolt Gallery