This 1976 analysis is too old and wrong
Read this from latest haplogroup report
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Iapypians are messapians........they are now know as East-Balkan people ....thracians............so clearly thracians are not illyrians and neither are messapians
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https://macsphere.mcmaster.ca/handle/11375/22810
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https://indo-european.eu/tag/iapygian/
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Iron Age southern Italians likely descended from early to late Neolithic farmers from Anatolia and possibly as far East as the Caucasus, and from migrants arriving from eastern Europe around the late Neolithic/early Bronze Age. These findings support previous hypotheses that the ancestors of the Iapygians may have originated in the eastern Balkan region, or derive shared ancestry with a common source population from eastern Europe.
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The Greek mythographers, as usual, derived the name from a hero, Iapyx, whom they represented as a son of Lycaon, a descent probably intended to indicate the Pelasgic origin of the Iapygians. (Anton. Liberal. 21; Plin. Nat. 3.11. s. 16.) For a further account of the national affinities of the different tribes in this part of Italy, as well as for a description of its physical geography, see the articles APULIA and CALABRIA.
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so if albanians think they match messapian language , then they are not illyrian, but most likely thracian, Albania could have had thracians before others arrives ...............I mentioned this to Salento about 2 months ago.
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To finalise, we have no illyrian script or language ...all we have is illyrian personnel names from Noricum ( east-austria)