When me and my cousin replaced the fuel pump on the '93 I had we put it on hislift and dropped the tank. I find it much easier (if you have a lift, which guys at a shop will have) to drop the tank rather than remove the bed. Beds are (in my experience) a bitch to take off and on. Then there's the annoyance of re-aligning it once it's back on.
If I had a lift I would use it to lift the bed off, thus eliminating the only difficult part of the job.