Not sure if anyone's interested, but here are the FIA's original paperwork for homologating the 914 and 914/6 in competition. Click on the links below each image to access full paperwork.
Group 3 914/4:
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https://historicdb.fia.com/sites/default/fi...004_group_3.pdf
Group 3 914/6:
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https://historicdb.fia.com/sites/default/fi...042_group_3.pdf
Group 4 914/6:
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https://historicdb.fia.com/sites/default/fi...626_group_4.pdf