Headgasket job

["cruznmd" <racuti1@xxxx>]

Since my "critical engine failure", I've been forced to accept the 
realities of my budget, and replace the head gaskets in place. I have 
a few questions before I get started:

1. The workshop manual shows a special tool to hold up the timing 
sprocket. Do I have to have this tool or is there another safer way?
2. My exhaust manifolds are not in great shape and I don't want to 
damage them anymore. Can I just disconnect them from the muffler and 
the "U" pipe and leave them attached to the heads?
3. I have been told that removing the manifolds is "easy" by some 
folks on list. #5335 has been in a very damp environment for years 
and the nuts and studs are fused together by rust. I don't even see 
how I can get at them all without removing the engine even if they 
weren't rusted. Is there something I don't know?
4. In short, can this job be done with the engine in place or should 
I be removing it?

Thanks,
Rich
#5335