Momo wheel hub adapters

[X2911]

Am restoring my 86 cabriolet interior. Now that Porsche has "officially" recognized that Momo wheels are good, I will be installing a 370mm Prototipo. Here's the question: which Momo hub will put the wheel in the same position as stock, that is where the steering wheel rim has the same clearance as the stock Carrera wheel? There are two Momo hub sizes available, but I have been unable to find what their dimensions are, lengthwise. The 370 mm Momo has a 39mm dish. I am not interested in any of the eccentric spacers (don't need one) or a quick release one (ditto). Any help would be greatly appreciated.