The 2005 was a crossover year. It either has the single row ball bearing or the larger single row ball bearing and there is no way of knowing what it has without pulling the transmission off and looking at the IMS bearing area. Porsche had a habit of pulling whatever short block was handy at the time. No the engine number doesn't help. No the VIN doesn't help. The experts on this have all said they have been surprised more than once so to be sure they have said look and see.
reference:
New to the IMS Retrofit? – IMS Retrofit
Your probability of failure varies with which bearing your engine has from ~1% per car year to ~.1% per car year.
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