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Yes, you no longer need to run vacuum to the flapper valve, so just use a 3 way coming from the vacuum source (H into G) as you said.
For the fuel rail, the simplest way to resolve it is to get a return type rail from a 2000 or 2001 model since your car already has all the return plumbing. There's probably some on eBay or I can sell you one or trade mine for yours (you pay shipping).