Well I called a guy I know that owns a body shop...alldata and another program they use didn't have any dimensions for the fiero. Thanks Guru for that info. I'll hold out for some more detailed info if anyone can come up with some. There's no rush on this car. Been this way since 92.
OK now that that's clear this is the drawing that Fieroguru was referring to above... it's for an '84 so many of the dimensions aren't the same as for your car however you can see how much more detailed they are and why you should try to find the equivalent one for the '88.
They're from a company called KLM Automotive Publishing Inc. You should be able to find a body shop that has these official repair specs. I got the one below just last year from a nearby shop but unfortunately they didn't have the '88 edition.
Body shop should have a frame manual for when they have to straighten a bent frame on a Fiero, something I hate about all this new fangled tech is that people depend on the computer. when these were built everything was in books, find a body shop that has been around since the early 80s and I am willing to bet a buck they have an old paper book with all the measurement points for when they have to straighten a frame on a Fiero. ask them if you could get a copy of the pages of those measurements.
------------------ Technology is great when it works, and one big pain in the ass when it doesn't