Who makes a chip or tuner for a 96 4.9L? Has anyone used one and how did you like it?

 

When I was looking for one for my 89 300I6 hypertech's PTM was the only choice. I haven't seen any tuners, even for OBD2, for the I6 motors. You might want to contact an SCT dealer or Sniper Inc to see if they have the calibrations available.