[Franco]

Take your time and it's not so bad. A few tips I learned when I did mine and some info to help you prevent bolts from breaking off
1) uses good sockets - 6 point sockets are the best
2) use wrenches that are in good shape -
3) run the engine till it gets warm - after you shut it off liberally spray the bolts with rust penetrating lubricant, try and find non-flamable or keep a fire extinguisher handy
4) let them soak over night
5) Borrow or buy an Impact driver - it has a 3/8" square drive to accept sockets - you put the socket on a frozen bolt and smack the driver with a hammer to loosen frozen fasteners - only use it on frozen nuts and bolts
6) use a long handeled ratchet - apply steady pressure when breaking loose bolts
7) when re-assembling use anti seize lube on all bolts
8) buy new bolt kits, they are cheap, about $15 at West Marine - elsewhere would be cheaper
9) they make plugs for the ends of the manifolds that have a zinc attached to prolong the life of the manifold
10) Remove the spark plugs prior to removing the manifold, when you remove the last bolt, the manifold will drop down and break one or more of the spark plugs, ask me how I know
11) label the sparkplug wires
12) usually it's a dirty greasy job, so put something down on the deck so you dont have but so much clean up when done.
13)buy some hi heat header paint and paint the manifolds again - 3 or 4 light coats keeps them looking good on the outside for a long time
14) It aint as bad as it looks
15)You can do it