Robert M. Gary wrote:
I'm curious where the actual requirements are for installing an IFR
GPS. My local A&P says he knows an avionics guy who is semi-retired. I
wonder if I could install a 430 in my KX-170B hole and have him sign it
off. Would Garmin or any reseller sell me a 430 directly? For approach
approval would the avionics guy just need to sign off the demo flight,
what really is the reg for signing off an IFR GPS install?

You need an IA. The installation requires a field approval or STC
(don't get me started). You will need to fly the test flight to
fininalize the installation. You really need an avionics guy
who is (or has access to) an IA who has done this before.