Vintage Cars: 1977 Mercedes 450SL, mercedes 450sl, crossover pipe

Question
HI RON, My husband is starting a head gasket job on this car.

How do get the nut off the exhaust manifold bottom stud cylinder 4?  Can't seem to get a wrench on it.

Also, which special tools will he need for this project?

Thanks, Ava

Answer
car needs to be , or should be on lift to do this job, will require removal of exhaust pipes, crossover pipe. Loosen engine shocks, carefully lift entire engine with jack ( block of wood under oil pan) and you should be able to get to bolts, no special tools needed