That's Awesome, I take it you brought the frame rails in towards the transaxle to get the rear tires under the narrower Shelby Chassis? Also this way it allowed you to utilize the factory length control arms and just get shorter axles. I love it and I am doing someting real simular to a Fox Body Saleen Mustang. Although we took castings and are making a fixture to make the suspension mounting points out of steel instead and then have that incorperated into the factory Mustang chassis. We will do the same up front. Essentually the torque tube will be simular to what a Corvette is although yours is structural and im sure its pretty thick alum.
When the GT first came out I went out and bought 2 Texas clean 63 galaxies and was going todo GT based suspension, GT transaxled pro touring car and do a 427 cammer on efi with a blower. At the time the cammer's were not being reproduced so, it was retarded money to buy a stock one, along with they really are not something you should try and make 1000hp out of for reliability. But now that has changed and maybe someday.....
But anyways this is killer and I love it as its so cool to take the old and mix with the new. Are you going todo a standalone computer so you can get away with having to figure out how todo the mass air flow sensor that close to the firewall?
Keep us posted and Good Luck....