That makes good sense.
The reason why I'm looking at using a 3201, is that there are no quality 16201's around.
Assuming internals are the same, then I should be able to put manifolds, rocker cover and intake piping including MAF sensor from 16201 on to 3201, solving my problem.
In your opinion is that feasible solution?
I'm affarid that there are no brilliant 3201's arround either
What I would do, if I were you, is do a complete renewal of the old 16201; that way you have a "brand new" alfa engine, no problems with electrics and fuses and no problems with buying the wrong replacement parts in the future.
Getting a good 3201 can be the same pain in the *** as getting a good 16201 or repairing your own engine. All 3 varinats are an expensive job to do and if you ask me, the best one is to have the old engine renewed; that way you have a new engine with 0 miles on the clock. By buying a used 3201 or 16201 u never know what you have bought and it can bite you in the ***.
But the good news for you is that there are a couple of of providers of reconditioned engines on ebay or you can check this site out: Reconditioned Engines. Rebuilt Engines. Remanufactured Engines.
I had my engine reconditioned and have no problems since; had a blown engine and had the same dillema as you, but after talking to a lot of alfistas, I decided to go the safe route. The whole recon + a new original clutch was 2000€, but getting a decent 2 litre TS is somewhere in the region of 1000-1500€ plus the installation and replacing the belts and pulleys and it's about the same (still, it's not a reconditioned engine and sooner or latter i would have had to replace the camshaft bearings, the spark plugs etc.)
Another thing about the 3201 is that it has the same problems as the previous one (cam. bearings, thermostat, MAF senzor etc.)