I experimented to see what I could come up with and here is my results. The following is the changes I made to the panel.cfg in both the FSX\SimObjects\CS_C130\panel AND FSX\SimObjects\CS_C130\panel.g. You will need to do it to ALL the panel.cfg files in ALL the other C130 panel and panel.g folders (e.g. CS_EX1_C130\panel and CS_EX_C130\panel.g) depending on if you have the Base Pack plus the Extra Pack I and/or Extra Pack II or the full C-130 X-perience package.

I replaced the original [Window07] with this one.

[Window07]
Background_color=0,0,0
size_mm=242,72
window_pos= 0.764, 0.050
position=2
visible=0
ident=AUTOPILOT
zorder=31

gauge00=Bendix_king_radio!Bendix-King Radio AP,  0,0,242,72

I could not remove the VC Autopilot! I think it is built into the VC, but I'll need to investigate further.

The problems are this:

You need to use the POWER, ENGAGE, HEIGHT, TRACK and GLIDE buttons on the A/P in the VC to get it to work. The POWER and ENGAGE buttons turn it ON. Pressing HEIGHT activates Altitude Hold to the height at which you engage button. You can use the 2D Bendix-King Radio AP to increase/decrease the altitude and the VS. TRACK will do all it's usual stuff and so you will need to use the Flight Director to control the Heading Hold, GPS, VOR or ILS. And the GLIDE button is required trigger APR on the Bendix-King Radio AP.

Unfortunately. I doubt that this will help when it comes to Project Magenta Glass Cockpit suite. Which is why I never really answered it in the first place. Sorry.

Mark