I have rebuilt axles with spartan locker and i kept the 4.10 gears mostly for mileage. I do mostly highway driving going to and from school and work and with the 4 speed my rpms are about 4000 at 70 so i didnt wanna go with lower gears and run even higher rpms. Id like a 5 speed swap like a w56 but idk its just not a priority when the previous owner already swapped in a solid L45. Maybe when i make mine a dedicated wheeler i can put some money into dual cases and some 5.29s  I agree though gearing makes a load of difference. My Dad sas'd a 92 and did a 4.3 vortec swap and it was nice but then he did 5.29s with 37s and it was awesome. Had to sell it though:(

With the LC though your sayin it was better than the tri y? where did you feel the power and how much of a change did you notice with them both? Ted from ENGNBLDR had nothin but good things to say for both (He's a freaking class act guy) and said they both were quality pieces but the LCE kicked in around 3000 and the DT was what he used most of  the time for racing. I like the idea of top end but i dont drive at 3000 constantly so i might just go with the DT. NWOR and Stans headers are also quality tri y headers from what i heard but They were both over $500 when i called and the DT are about $440.

I appreciate the patience and replies i just like to put quality parts on my truck.