It's my understanding that the 7.3 was available until the 2003 model year when Ford introduced the unfortunate 6.0L engine. Lots of information available at http://www.ford-trucks.com/forums/i....

I personally prefer that forum to the www://www.powerstroke.org forum. Powerstroke.org seems to have more members interested in blowing black smoke out twin stacks than does the ford-trucks.com site. I've replaced my injection pump and injectors with help from ford-trucks.com members, as well as lots of other little fixes. They also have a small discussion area for alternative fuels specifically for the Ford truck.

Best of luck...

T