I am. I bought a set of 5 point harnesses and use 4 of the 5 belts. Here's where I connected them.
Sub belt (or crotch belt) connected to the cross bar under the seat.
Left shoulder belt connect to stock should belt bolt.
Inner lap belts connected to stock bolts.
Outter lap belts I think I drilled and installed a bolt through the floor board.
It will be a couple weeks before I see my Truck again and before I can take some pictures.
I think they look good and they do a good job of holding you in the seat. They really help when corning hard because you can use your arms just for steering and your feet for working the pedals instead of using them to keep you in the seat.
I use them with the stock seat belts.
Also if you get pulled over for speeding and the officer asks "Do you know why I stopped you", you can reply "To check to see if I am wearing my seat belts?".