Those NPI intake manifolds before the redesigned model with the aluminum crossover were INFAMOUS for cracking at that coolant crossover, which was made of plastic prior to the redesign. The whole 'you dropped a wrench' line is bullshit. Smack him with a torque wrench and get that car the fuck out of his shithole. There's plenty of killer shops you can find out about on this site. Check em out, get some quotes, and you'll be set!