I'm running the same pump and gauge and just finished the gauge install last night.
As stated, you'll need a T fitting with a 1/8" NPT female fitting for the sender and (whatever size line your running) barbs for the flow through. I'm running the FTB so the barb fittings were 3/8" but if you're still OEM, you'll need the 1/4" barbs.
First attempt with 3/8" NPT-F T-Block from NAPA with 1/8" Reducer on top and the 3/8" NPT-M 3/8" and 1/4" hose barbs.

I never installed it as the project kept getting delayed.
When it came time to do the install, I couldn't find the thing. Back to EVCO for a do over and, of course, found the first one when I got done running the lines.:rolleyes5:
Installed

I need to get it secured at the fire wall so extending the line from IP back is next on the fuel system TTD list.
P.S. You're welcome to the original one with the barbs N/C. I've no use for it now and I know where it is. PM and I'll get it in the mail in the morning unless you're in a hurry.