Thank you for your input. I've decided that the stretch is too much.
I think that I've figured out a solution for a pedal assembly that will allow me to have the leg room that I need with out lengthening the cockpit.
I think that I'm going to keep the wheel base stock and bite the bullet and spend what it takes to get a transaxle that has gear ratios to match the out put of the LS engine. This will allow me to use the body as is.
One thing that I'm pretty sure that I'm going to do is build a new frame. Something more in line with what the Ultima has. (not a copy of course) Why go to all of the trouble of using good suspension and not have a frame to match.
Joel, Your GTO build was one that I followed. And, your Miura build is awesome. You have great vision, talent, and PATIENCE!
Here are a couple of pictures of the Ultima frame.
