I am thinking of going the 911 Tiptronic route on my 91 van with a JDM
2.0 turbo Subaru motor I am going to put in.  The 911 auto transmissions
are not difficult to find, and at 1500-1800 dollars are a little cheaper
than a beefed up automatic van transaxle.  They also have limited slip and
much taller gearing.
    I have talked to a few shops that part out Porsches and know a bit
about them.  They said the separate ECU for the transmission does is not
connected electrically to the engine ECU or engine.  I am going to confirm
this before I buy one but right now I think it is pretty doable.
    I will let this list know the further along I get.

    John
    87 Westy SVX
    91 GL (just starting 2.0 Subaru turbo conversion)