You're easiest route to fitting the Alu 'arms would be to use the shafts/CV's off the same car ('86 & '87-'9x) The hubflanges in the Alu arms are specific. But they have the same bolt pcd as your 901 outputflanges/944/T2/T4.
The 924 shafts are the same length as T1.
Matt
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'79 Karmann, Nrburgring or bust...
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