I just swapped the ports today. One thing I noticed while fitting the exhaust is that the long fuel hose supplied by Lycoming that connects the spider valve to the outlet port interferes with the heat muff assembly that is mounted to the #1 exhaust. By moving the outlet fuel port to the top of the fuel servo, it frees up a lot of space. The downside is I have to order a shorter fuel hose to avoid dangling the hose too close to the exhaust stack.
RV8 standard build: Empennage 99% completed
Wing -- Closed
Fuselage -- Canopy Done. Fiberglass 80%
Avionics Installation -- 90%
Firewall Forward -- Engine hung
Electrical -- 90%
Donation paid through 2021