As far as the fuel pump.....on my s10 I found it easier/faster to remove the bed to access the pump. Not sure if this would be the same with the ram. I would disconnect the tail light harness, remove tail gate, disconnect 3 bolts for fuel filler hose, then 6 bolts underneath holding the bed on, and a few neighbors (tempted with a six pack) and then you can work standing up (or sitting on the frame). Much easier IMO. Probably would take you an hour to get the bed off...
Breathing in and out is good enough for me.