I do have a few AM6154's for sale - drop me an email if interested!

Jay n1av@arrl.net

Thanks Ron,WZ1V for the scans.

Power Supply modifications for BOTH AM6154 and AM6155 models
Power Supply Mod
Cleaner version of the directions: Power Supply Mod
Power Supply schematic
AM-6154 Operations manual
AM-6154 Manual (alternative)

RF deck modifications
AM6154 (Only) RF Deck Modification
144 MHz Grid Circuit Changes

VE2ZAZ and W3RJW sites have a lot of good info:
http://ve2zaz.net/AM6155/AM6155.htm Great site. Easy to navigate and a ton of good info, including the metering mod which makes it easier to understand the values on the meter after modification:

 In step II-A-2, use 2 x 20 ohm 2W resistors instead ox 2 x 10 ohm. 
 This provides a x10 meter reading factor on the plate current instead of x20. 
 In other words, a reading of 34 would indicate a plate current of 340 mA, much easier to read than a reading of 17. 

http://www.w3rjw.com/FAA%20Amp/Amp_PSC.htm Standard directions on the modifications to the power supply as well as modifications to get on 432 MHz.

222 MHz modifications
AM6155 - 222 MHz
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=14473
eham.net reviews Good for callsign info on who has worked on these amps
K7XC's 222 MHz mods. Good step by step info. I also made a local archive: K7XC_archive
WZ1V and N1DPM tech notes on the AM6155


432 MHz modifications
www.packratvhf.com/a6154_55.pdf
http://www.packratvhf.com/Article_1/Article1.htm
www.w3rjw.com/FAA%20Amp/Amp_PS.pdf
http://www.qsl.net/kt4ja/am6155_grid_bias.html
KF0M's mods Images plus text mods sheet.