Sounds like you have all that you need to repair it, other than gaskets.
If your car has the "dam gasket", the one that holds oil in the bottom with an extended flap of gasket, be sure that you use that one again (or go by engine number). Later blocks use a regular gasket as they have an oil squirter for the vacuum-pump.
Sorry about the low time estimate, I have done it in a 201 and 124s, and the process is much easier (fan and shroud removable with the radiator installed and all hoses on it).
Also, you might consider a Stanley ratchet, they have a design where you can twist the handle as well as swinging it to rotate the socket, works EXTREMELY WELL in tight spots instead of going one-click-at-a-time with a conventional ratchet wrench.
If I had to choose between my air-ratchet and the Stanley, I'd keep the Stanley.
Originally Posted by gsxr
Turning your nose up at the 603 due to the head issue is like snubbing Cindy Crawford because of her mole.
1987 Mercedes-Benz 300TD Turbo Pandora
4-puck brakes & '95 A-arms, Bilsteins, 215/55-16 Michelins on 16x8" Bellos, updated interior, #22 head w/ oblique injection, Garrett T-30 55 @18.5psi, 3.5L IP turned up 25% @ 14*ATDC, ALDA tweaked, afterglow, updated timing cover, big alternator, etc., etc., etc. 4000lbs of fun http://www.youtube.com/watch?v=RZCI0BTWKx8