I needed to slide a pipe over my wrench to get my exhaust bolts off.
Also, you may have considered this already, however you may want to purchase new hardware for reinstalling the manifolds... I snapped a bolt inside of the head putting the exhaust back on.
I take full responsibility for this post. Anything I've written here is an opinion.
1994 Cougar XR7 V6 - Black. New Paint, Alpine HU, Infinity Perfects, Phoenix Gold Amps, Audiobahan Sub, PG 232 EQ