tuning ECO to run on alcohol

I'm looking for info on how to tune my car's computer so I can use
100% alcohol as fuel ... anyone got any pointers, suggestions where to
ask, ideas ... please

the plan is to distill my own fuel at home (here in the US you can get
a free license to distill up to 10,000 gals per year)  ... cost
estimate is under 25 cents/gal ... beats petro-gas!

I've been told that most US auto manufaturers still sell (but don't
advertise in California!) cars that can use alcohol fuel (one pleasant
legacy of the Carter years) but i don't want to buy a new car ... have
a '97 Volvo 850 T5 and '93 Dodge Caravan 3.3L, so hoping to get info
for both those

also, need info on OBD II pinouts / connectors for laptops / PDAs ...
suggestions?

thanks in advance
alan