98 1/2 the VP-44 came into use, electronically-controlled mechanical pump. Quality control on the circuit boards could be spotty, fair number of cold solders got through. If you buy a rebuilt one make sure it has new electronics in it too.
P-7100 was used 94-98. Price an FSS (fuel shut-off solenoid) and you'll put a kill cable on it.
89-93 used the VE-44 rotary pump, doesn't have the fuel-pushing ability of the P-pump, but a lot more tunable. Same thing as the P-pump with the FSS, if you only call Dodge, but VW has them available for about $25.
I think it was 08 when they went to the common-rail and 6.7L.