I've been running a high pressure pump/surge tank combo (RobbMc PS500) with my Sniper 2300 since last August. IMHO, it's the only way to go. It is fed by the mechanical fuel pump -- it actually uses the entire stock fuel system -- from the tank to the hard line atop the mechanical fuel pump. I only had to extend the 5/16" rubber feed, and the 1/4" rubber return line, from the surge tank back to the hard lines on the frame. The only reason they had to be extended was that I put the surge tank where the charcoal canister used to sit on the passenger fender. Others have installed it just beneath the coolant overflow tank on the core support (next to the radiator) and used the stock rubber lines as-is.
The surge tank setup is my new go-to for several reasons:
1. It's quiet. Like, so quiet you only hear it (faintly) at key-on, when it primes the injectors. Otherwise I don't hear it.
2. Easy to install. With all the fittings and hoses, it's a 2 hour install -- tops. No dropping the tank, no rooting around on the frame rail. Takes one power wire from the Holley Sniper fuel pump relay, and one wire to ground. Install the rubber feed/return lines, install -6AN high pressure feed/return to TBI. Done.
3. Easy on the pump. No lifting fuel from the tank like a frame-mounted pump. Stays submerged in circulating fuel, so pump life should be pretty good.
4. Easy to fix. Uses an off-the-shelf Walbro pump. Take off the lid of the can, swap pump, replace lid. Done.
5. Completely solves any fuel slosh/cavitation/starvation issues. Will say that some folks run in-tank/frame rail pumps and apparently don't have a problem -- but some people definitely do. Surge tank setup completely eliminates fueling problems -- unless you completely run your tank out of gas. If that happens, take off your 5/16" rubber line and fill the surge tank with a quart of gas after you fill your gas tank. Then you will instantly restart, and prime your mechanical pump in record time.
Again, one person's experience, but I've been blown away by how well this works, how simple it was to install, and how straightforward maintenance will be if/when there's a problem.
Only other advice would be to steer clear of the FiTech Command Center. That thing was a catastrophic piece of junk. Major issues with the float system and the fact it deadheaded the TBI. Overheating, venting fuel to the engine compartment, lots of horror stories with that one. Apparently they've sorted some of the issues out with the latest Hyperfuel surge tank -- though I don't even see it listed on their website anymore. Still for sale at Summit, but not clear if they're still making them. There are much better options.