I own a 1986 740GLE wagon with the 2.3 liter non-turbo motor and auto trans. All stock. What is involved in converted to a 2.3 turbo motor using my non-turbo mmotor. I have access to intake manifold with all parts sans intercooler and exhaust manifold and turbo. Can I use my existing 2.3 non turbo head with a thicker head gasket to drop compression ratio? Do I need an intercooler? What other parts-the ecm parts numbers are different for turbo and non-turbo motors so I assume turbo ecm is needed. New ecm is $902 from Volvo. Any sources of used ecms? Is this possible or just a dumb idea. My motor is original to the car has 191K miles averages 24mpg city and does not burn oil. Thanks.

I pondered this same question and my solution was to just buy a turbocharged car. It required the least amount of labor and chasing all those parts. I picked up a 765T cheap and now I have POWER. I still have all the other NA cars for the daily boring commutes.
Sounds as if your car is in fine shape mechanically, like they say "if it ain't broke, don't fix it" especially if it is your only car.
That said, the conversion has been done and TBricks has all the info you need if this is the way you want to go. Good luck,rcs

Check turbobricks.com for more info. Read the archives, FAQs, do searches, etc.
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While I would never deliberately mislead anyone, take into consideration that any information and advice provided was at no cost to you.