In article ,
MARK wrote:
I HAVE INSTALLED THE FOLLOWING IN MY 1975 ARROW.
GARMIN 430, GARMIN 340, GARMIN 327 TRANS AND GDL FOR WEATHER DATALINK. I

The first question is whether you could ever find a buyer for that Arrow.
If it's in otherwise nice condition that panel doesn't seem like overkill
for a fast single. As for how much you are throwing away, well, figure
out what the used value of all those bits are and add them up, and subtract
that from what you paid for the radios and installation, and that's about
what you lost. Probably 50%.

--
Ben Jackson

http://www.ben.com/