Hello, new member first post. I have a 99 K3500 crew cab dually with the 7.4 Vortec and 4:56 gears. It only has 88000 miles but was obviously worked hard as a farm truck. It runs good but when towing a heavy trailer I am getting a dead miss/cutting out. I just had a new Carter fuel pump & fuel filter installed less than 500 miles ago. No miss unloaded, runs like a scalded dog. I've read about the OE injectors & fuel pressure regulator both being problems and plan to change soon, but I wanted to post and ask if i should check anything else before doing the injector swap. TIA for any input.