You will have a tough time finding a commonly used method for mounting and for that matter locations, although common areas have been pointed out over the years it is always up to the individual builder where and how they make hat connection.
Solid mounts, flexible mounts, (bolts, adhesives), chassis mounts, hidden mounts, visible mounts... And that's assuming it's a Fiero build, using a tube chassis becomes another element that is different than the donor version.
Another issue is if you keep the single huge body intact or you dissect it to the individual panels.
In the long run the individual panels will allow a less stressed car but is easily ten times the headache to mount as each panel requires that many more location points.
If there were a "book" on how to do anything with these cars I believe we would have all purchased it and there would be no need for forums other than show and tell, truth is we all write our own individual books for our individual builds, some are open and some books are closed, all are coveted just the same.
If you have a method that you are unsure of then post and see the collective response, plenty of people will assist you with your questions and your ideas