To be honest the simplest / cheapest solution is to keep current speedo plugged in but recess it or take out of housing and buy a gps speedo. The fiero needs the vss loop I.e. signal saying Speedo is plugged in to run pproperly. So its gps or gut it open see bottom of my post 4 details on that
2. Use a dash overlay. Find it online or I could send you. 1. Open clear plate split down. Middle untill you reach center. Useca hole punch and 3m glue it. Go to a printing shop like kikos or use photo paper. Down side it wont be accurate when traveling but use ur phone or gps and take mental note I.e. speed says im going 80 u know really your doing 40. Same with tach except if you have se then split tach in half so you can still read oil pressure. And you can use lexan and apply a light tent to it to reduce any obvious
3. Call tom look him up on fourms or google tom fiero digital cluster. Run you around $500 for all, but I dont know what he charges for hust the speedo. Maybe worth the investigation. But 1 digi and others analog will be uuuhhhhhh yea.. ur call.. none the less it is an option. Toms does require some installation as well. How much im not really sure. His website explains that though
Other than that you have to be good with sodering and changing crystals. Its waaaayyyy past my lvl of electricity. So yea there ya go. Let me know if I can help.
[This message has been edited by logical1 (edited 02-22-2014).]