Clearly had I given it a bit more thought I might have realized the subtle differences, so here is trying to save someone else some aggravation if they are going to get parts out of a yard or on the web. These pearls of wisdom come to you with dirty hands and some bemusement.
Turbo throttle bodies have a 2 1/4 inch diameter throat opening, this is married to size of the intake manifold. The turbo hose to the throttle body is also a specific size and is not interchangeable with n/a engine.
The throttle body in a normally aspirated motor has a wider throat at 2 1/2 inches.The intake manifold allows for this size variance. Ditto for the hoses.
Note plastic on the normally aspirated throttle body, no such device on the turbo version.
The normally aspirated T/B bolts on as normal to the turbo manifold, but will not open because the diameters are different. The edge of the butterfly catches the manifold and will not open further than about 1/4 inch. This is obviously due to the 1/4 inch difference in diameter, and there I was thinking that the "elusive inch" was a big problem.
These throttle bodies are not interchangeable. You might still be able to make use of N/a manifold on a Turbo engine. It is probably not a safe bet.
Not too much harm nor much foul, and not even foul language.
