Hi Vern
I am glad to here there are some of you from across the pond that understand how good we build 4x4s in the midlands
Joking apart I think you are going to struggle to get this project past the customs guys, the age of a car in this country is determined on a point system.
Every time you replace a part on a car that is 25 years old or more you loose a number of points depending on what it is.
The engine, the gearbox, the suspension system and the chassis, carry the bulk of the points and therefore if you take a 25 year old S3 and fit all these off a 110 then it will no longer be classified at 25 years old.
There are plenty of people on here that know much more about this than me and may be able to tell you a way round it but I think you have 2 options open to you.
1)Buy a 25 year old S3 and take it to the states as it is, then import from this country all the bits you want to change and change them over there, (very expensive I would guess).
2)Buy a Land Rover over there (it will then be left hand drive) and then you will have the best of both worlds, a real 4x4 and sitting on the proper side of the motor.
Maybe someone will come up with another way for you, we will have to wait and see.
Don't forget to keep in touch with us when you go home and let us know how you are getting on.
Best of luck with the project, keep us posted.