Any opinions on have much boost i can safely run with a stock fuel system?

Are you getting your fuel press reading before or after the filter? Nice video,will it maintain that steady pressure pulling 54'-66' of trailers wieghing 10-14k down the interstate w/15-20 mph crosswind at 75 mph? I want to upgrade my fuel pump but need to be practical in what i spend,i use my truck for a living,regular maintinance is costly don't have unlimited funds for a "Toy Truck". Always used OEM pump,i did have the inj. pump go out at 425k,replaced w/remain from Diesel Specilties(that was 340k ago). Since i bought this truck i've replaced a engine block(cracked along the water jacket ,at 453k) cummins said that some block castings were thin there(the new block was beefed up consederably were my original cracked),3 count them 3 NV5600 trans,(finally replaced w/Fuller 8406 14" clutch) 4 or 5 APPS assemblies,going w/the TIMBO FIX just not purchasing from him.(just to name a few major items. Routine maintinance oil changes every 3-4 weeks,new rear tires every 7-8 mo's. So you can understand that hard for me to fund High Dollor Performance parts just for "Fun". I did some looking probly go w/the raptor 150 seems resonably priced w/ the flow/press that would fit my needs.