It's really not all that bad, just take your time and label every single part you take off. If you have a digital camera, it may help to take a picture as you take each part off so you can look at where it should go when you re-assemble it.
I took a total of 18 hours (or would have if I had the tensioner right the first time
). That included cleaning every part to where it was spotless inside and out (except the camshaft housings because I didn't want to get solvent into something I wasn't disassembling, they are two parts, but come off as one piece). The carbon deposits on the pistons, valves, and intake added 5 hours... I'd never seen it that thick on anything before!
When you take the camshaft housings off, tilt the top away from the center of the engine before you lift it vertically because all the followers will probably fall out, they did on mine anyway. That way if they do fall out, they'll at least land on something clean. When you're ready to reinstall the housings, remove all the followers and wipe them clean, then put some assembly lube grease around them to make them stick in there a bit.
Also, put the bolts back in the housing and snug them up before you take the bolts out of the timing chain housing. The cam lobes will be holding at least two valves open, and if you don't have the bolts in the top while you remove the ones through the front housing, I'm afraid you might crack the timing chain housing because it will try to twist as the front bolts are removed. Find the tightening sequence and remove the bolts in the opposite order that you tighten them, the same goes for the head bolts if you would end up having to do the head gasket. Also, the head bolts and the camshaft housing bolts are torque-to-yield, and must be replaced once loosened.
One other thing, since the engine is interference, don't rotate the crank- or camshafts when the chain is off. If you end up rotating the crankshaft to better clean the pistons like I did, make sure the timing marks are all lined up before you put the head back on!