D350 performance

[LRose]

I own D350 93Dully[Cummins] for the 6yrs pulling a 5th wheel. Im not a mechanical guy regrettably,i was not getting the performance i was expecting so i asked around. First two Dana 70 got torn up on me before aDana80 corrected the problem. For more power ihave installed a Banks turbo exhaust and a16m turbo. The differance is very noticeable especiable up hills. Im not a speed merchant but would like to know if there is an ecconomical and none technical way ican get a little more power safely. I am apoor guy and its all about towing. THANKS