I had these made and they finally came in. HD 10.9 grade. Center-less ground to the largest diameter they can be after measuring several castings to find the smallest diameter hole.
I had the threaded area made a little shorter because the factory bolts have a lot of threads in the suspension bushing sleeve. These will have more solid area of the bolt in the bushing sleeves.
I may never sell many of these but I have seen some demand for them.
Fiero Parts And Acc's Web Page:
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Rodney Dickman's Fiero accessories
7604 Treeview Drive
Caledonia, WI 53108
Phone/Fax (262) 835-9575