i have a 93 dodge b350 ram van, with a 360 (5.9) efi motor, built in 9/92, modified 12/92 (it's a minibus with a wheelchair lift), having fuel problems, i replaced all the goodies up front, fuel pump wouldn't engage, so i pulled the tank and to my suprise the pump says 94-95 only on it, had one for a 93 from a salvage yard and both are different, van is piped for the 94 pump, what's going on here? also i saw something about a "hayes" switch, what is it and where would i look for it? thanks any help would be appreciated