This is not an American car. The bolts and nuts holding the pipes to manifolds are a piece of cake. Also the manifold to head is held with studs threaded into the head as it should be whenever aluminum and steel are involved, again no problem.
If I were you and planned on lowering the transmission, I would pay close attention to the jillion things at the front of the engine such as the fan hitting the shroud and the radiator hoses, stressing the expensive plastic radiator tanks.
Best of luck,