Best GPS and Auto Pilot Upgrade for a 1963 M20C?

[Ragsf15e]

Just remember install won’t be as simple as you’d like.  New antenna, antenna wire and connections to autopilot and avionics.

[Van Lanier]

Many thanks, gents.  It looks like the Garmin 175 will give us the GPS nav/approach capability we need.  We already have two KX-155s with G/S and a Garmin 345 transponder that communicates nicely with the iPad running Foreflight.  I think we'll install the 175 for now and see how it goes.  After a few months, we'll wrestle with the autopilot decision.  I understand and appreciate the comments on installation.  Adding anything to a Mooney is a character-building experience!  

[Andy95W]

You can get good money for a KX-155 with GS and a display with no burned out segments.  Maybe consider selling one of yours and get the GPS/COM version?  Don’t forget you’ll need a CDI that’s compatible with the GPS (a G5 works really well).

[Oscar Avalle]

On 6/8/2022 at 12:29 PM, Greg Ellis said:

In my 63 C model, I have the push pull controls, not the throttle body like Oscar's.  The push pull controls are about where the 650 is in this photo so in some C models, I don't think they will fit one on top of the other.  See panel photo below.  This is with a GFC500, GNS530 and GNC355.  Not sure if a 750 and a 650 would fit with the controls where they are.  Maybe, maybe not.  Of course without the GFC500 there is more room but I am not sure if it would be enough.  And definitely not enough room for a 750, 650 and audio panel.

Yes, when I did the instalation I had to install the STEC 55X a bit slanted and my avionics shop basically told me that the transponder and the intercom had to be installed remotely and managed from the GTN. 

[McMooney]

On 6/8/2022 at 5:38 PM, M20F said:

I think the important thing we can all agree on is the push/pull controls are far cooler than the throttle quadrant.  

everyone knows the quadrant is better