I am in the process of putting in a new engine, hopefully this weekend. I had some time to work on the exhaust by putting in a 3" collector and exhaust pipe to the muffler. It can be done though it is tight. I have seen Pat Miacal's system and he has a small dimple in the system where it crosses the sway bar. Hopefully I have eliminated it. I also am putting a flange connection right before the muffler so that I can attach a straight pipe for track days. I'm learning to weld so its functional.
If someone is going to do this they will need 2 180 U bends and a couple of feet of straight pipe. I don't think you could go more than 3" OD. The other alternative is to use some oval tubing under the axle. Just a bit more complicated to do.
Mark
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.