Problem solved!
The final problem was the tunnel. While looking yesterday to see where fumes could be
coming from I realized there wasn't any type of boot for the shift linkage where it exits
the rear of the tunnel. Temporarily to test I used some duct tape inside and expandable foam
outside to seal the end of the tunnel. it worked great, so then I went to the parts catalogs
to see what I could find, and found that there is a 2-piece (inner/outer) boot that belongs
there.
These parts can be found in the
911/912 Shift Linkage and Pedals section in Pelican's
Catalog under
Shf Couple
Thanks for all the input