An S10 uses torsion bars for the front IFS. The most common way to lower them is to just crank the adjusters out which messes with the front end geometry. If he didn't make a bunch of changes to the front end, you might be able to get it back to a reasonable height by just readjusting it properly.
If you want the GM process for adjusting those, let me know the year of the chassis and I can pull it from techline for you.
