Its easy. I did many times, all 3.8's the same.
Jack up the passenger side.
Take wheel off.
Get under the car and look at the harmonic balancer.
Take white paint or marker, something white. Spin the crank pulley till you see the timing marks and wipe them off.
Put a white mark where it shows 10 btc. be careful its not 10 atc or you'll have major issues.
Connect positive timing light power on the alternator under that red cap, its pos constant power, and the neg anywhere.
Put the lead on the cylinder 1 spark plug wire, the one leading to far back left cylinder.
connector and start car. Point the gun at the balancer. If the white marks not where the tab...
You have to get a 10 mil
socket and long extention and turn that bolt at bottom of distributor. Losen it so that you can spin the distributor, but not to loose as it spins itself when cars running.
Point gun again and keep spinning in whatever direction till white mark lines up with tab.
Tighten bolt, point gun again to make double sure. If good, put spout
back in, wheel back on, lower car, done!