fuel pump's fine, good call on the axles/hoses...just buy an FPR (fuel pressure regulator) and raise to **stock** fuel pressure for the right motor, ie 98 LS fuel pressure.
OBD I ECU as an OBD II ECU WILL NOT PLUG AND PLAY. Should be able to run the stock ECU to save money, or go to a 94/95 LS integ ECU...
-B