[STL Mark]

Wow.
Your car is one of those new 289 Slabside cars right?

Hopefully some folks here we'll help you with your next steps.

If it was me I would do the following:
1) Never go back to that shop again - ever.
2) Find an engine real pro to tear that lump down and repair it.
3) Contact an attorney.

I don't know where you live, but if your were anywhere near St. Louis, Missouri (or felt like paying for shipping) I could hook you up with the best group I've ever seen. A group that is trustworthy and knowledgeable, with the only goal of getting right. I can provide you with numerous references of local Cobra owners that are very satisfied.

Fell for ya bud.

(weird - that's the second post today for me that I had to say that)