I saw some once that were fabricated using square stock and the subframe connectors were connected under the seat perches and welded from the inside .nothing could be seen on the bottom of the car and there of course were no ground clearance or exhaust pipe interference issues. The owner had the short section that was visible in the backseat foot area covered with carpet. Later when he restored the car back to original all the ugliness was hidden under the carpet inside and nothing could be seen on the underside. It was trick. Bob
Thanks for the reply, and an excellent suggestion. I've seen them done that way also.
Unfortunately, since he has just got it back together, I think he's looking for a bit less invasive route.
Shasta Mustang played a large part of this car's resurrection and it was gratifying to see the owner beaming with pride as he showed off his finished product.