The 3.0 12v CR is 8.9:1, too high for much turbo action on a 2v/cyl engine. You will have to fab up an exhaust manifold and some way to get the dside exhaust flow to the turbo. You can not use the 3.0T exhaust mani because it fits the oval port 4v motor. Unless, of course, you use the 24v heads, which presents ignition problems, since there is not a dizzy drive on that head.

Not responsible for advice not taken...