Well actually Air Ride tech. does make a bolt on 4-link but it is for the S-10..... so if you have the S-10 rear end in your Luv..... Yes you can have a bolt on 4-link but they dont make them for a Luv
I have already looked into the whole deal with that and made a couple to calls to them. They told me that if I have the S-10 rear end it will bolt up but they couldnt tell me of any mods that might have to be done as they dont know what the bed looks like and if there may be any cutting involved lol
As far as the C notch goes I think that would really depend on how far you want to drop it. So right now if I wasnt selling my baby I more than likely would go with this set-up and hopefully be able to let other members know. Just my two pennies
Later
Husker