A+ On the advise offered on this board.
The problems you have given are exactly what mine gave me, only dif is that I was able to get it home first.
I followed the advise given here and found the alternator to be toast.
I have just sent my old alt (core) to Ken at the MARS web site for a rebuilt replacement. Much cheaper then buying a new alt.
But take the advise listed above come to your own conclusions and do as you best see fit.
If the alt is truly the problem then have a look at this site.
http://myplace.frontier.com/~hemi-roid/Best of luck.
Greggh