Thanks guys! These photos and information have been very helpful. I ordered the newer gas valve (#31098) because it looks like it has the gas inlet and outlet ports in the correct place (or at least close to it). Supposed to be delivered Thursday. I'll let you know if it works when I get a chance to mess with it...hopefully this weekend. If not, I may have to go with the 31150 and try to find that L-shaped tube on the outlet side. Otherwise, I don't think I will have enough room at the bottom of the valve to connect the gas line on the inlet side.