Ok you just sold me on throwing a turbo on the 83 slant im putting in my 64 dart until I can rebuilt the 64 motor.
What little I know about it, never having done it myself, here are some pertinent points I've learned in reading on this, and the Slant 6.org board:
The Buick turbo off the '86 and '87 Grand National and T-Type cars is a good match (size-wise) for a 225 /6. There may be better ones out there, but this one has an internal wastegate (less packaging complication) and the sizing is close. It will work pretty well, "as is."
Junkyard units, while not plentiful, are out there, and are usually pretty reasonable.
A 2bbl manifold is a good upgrade in induction, and there should be no trouble finding one of those.
The stock exhaust manifolds are prone to cracking, so I have seen recommendations that suggest attaching a bolt-on "elbow" to the manifold at its outlet and welding the turbo flange to that, instead of welding on the cast iron manifold, itself. This may cause packaging issues, so look at making that piece a close-coupled unit that will not create intereference issues with the innner fender panel.
For low-boost applications, it should be possible to run a boost-reference line from the carb hat to the back-side of the mechanical pump to keep the right amount of fuel flowing when the boost comes on. An upgraded mechanical pump might be a good idea, here...
Initial mechanical spark advance needs to be adjusted back to about 18 (!) deegrees TOTAL, at first, to see what the engine will tolerate before detonation rears its ugly head! Detonation under boost is.... undesirable.
The carb needs some massaging in terms of boost-related flow-thru fuel metering. I can't help you with that, but theere are several others here, who can.
The stock rear axle ratio and torque converter should work well for you.
Good luck, and let us know how this works for you!!!
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