I would check the injector return rates first. If they are within specification you can probably get a good bit more life out of them. In my experience (which is far less than Bradley's), a lift pump has always cured P0087 codes. One truck in particular has gone almost a hundred thousand miles since the pump install with no further repairs to the fuel system. The truck now has 350,000 miles and still has the original injectors AFAIK.

James Kuhns
Owner/Technician
Auto Tech Solutions
Chatham, New York, USA