Our 78 had the permanently attached, 25ft power cord that lead out of the bumper...Here's what I did to 'upgrade' to a removable, late style shore power cord:
http://www.airforums.com/forums/f173...way-41888.html
Go down to post #44 & 46 for some pics and part number info, etc...
I don't know if this would be applicable to your particular AS...It was a relatively easy project, and it's a BIG improvement when dealing with the power cords!
I use a short 'adapter' cord at home that plugs into the AS and has a male 20amp connector on the other end...I use a heavy 10/3 extension cord from the adapter to the house for power, and leave the heavy 30amp RV cord stowed away for use on the road...