If you can find the 1988 Motors Tune Up and Electronic manual somewhere, you should be able to get that information. My '86 version has the '85 info - seems to run a year behind on vacuum diagrams. There are many different variations and you need to know yours to get the right one. I can copy the '85 pages and forward, but I am all to well aware that they went to multipoint fuel injection in '86 -(the reason I have this manual was for my '86 GT) and made lots of underhood changes. Don't you have a 'friendly' local Ford dealer nearby??