EASY install - did my 97 about 5 years ago...
One tidbit - one of the "IGN" wires listed (can't remember the color without the wiring chart in front of me) is fed via a diode in the van as well, so there's 1 IGN, 2 ACC to hook up.
Only problem with mine, one of the tach wires (there's 3, 1 for each pair of sparkplugs) didn't work for the car starter - about 1/2 of the time, the van would crank a few seconds, then just stop (car starter went dead) - I changed it to one of the other tach signals, and it works about 99% of the time. Now it once in a very great while will start to crank, then give up before the van is started. - Not sure if it's a coil pack problem, or a PCM problem, but it hasn't gotten any worse than before.
I've put about 20 AstroStarts in my vehicles and friends vehicles - Dodge's are definitely some of the easier installs.
I think I ran the wires through the firewall using the hood release grommet. - I bought a factory hood switch (for the alarm) and wired it up so no drilling either.
Solder your connections, and tape them up well - The module sat right on the sound insulator above the pedals, so it's easy access if you need to reprogram anything.
Good luck!
Billy
