the shaft would fall below the plane of the frame too far forward to clear obstacles most likely.

I did a 1 piece in a S10 Ex cab once & hi centered it at a point where the frame should sit solid & barely the exhaust pipe would touch
I found out immediately what else was dragging in the dirt when I got out on the road about 25 MPH
Had a small dent with an oval shaped swell around it at the point where it broke the plane of the frame about a foot ahead of where the two piece joined

One piece works good on Drag trucks that don't get as daily drivers