if going with EFI, the EFI 5.0L HO would be very hard to beat.. Mustangs and late 80's/ early 90's Lincoln Mark VII LSC's got them.. used with an aftermarket retrofit harness and the factory ECU, they can be just as reliable as they were in the Lincoln or Mustang.. if gotten out of a junkyard, it might be a good idea to get new injectors and put new gaskets between the upper and lower intakes... there the engine of choice for '83-'97 V8 Ford Rangers.