hey z50, it's on page 2 of the manual, in the "tools" section.

It's interesting to note that the little counter-sunk screws used in the differentials are metric, 1.5mm.

Anyways, in case you don't have the manual handy, here are the sizes:

0.050", 1/16", 3/32", 5/64", and 1.5mm

The standard sizes are the usual bunch for AE vehicles. The 1.5mm size used in the diff is just a bit awkward...

What type of hex drivers are you planning to buy? Save yourself some trouble and buy a good quality set. A quality set will be the last set you'll ever need... I personally prefer MIP/Thorp drivers. Others swear by Hudy stuff. The AE stuff isn't too bad either...
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I have a question. What size bearings do you need to replace those bushing used in the steering cranks? I'd like to replace those copper bushings with some good bearings to prevent the buildup of slop that will eventually happen from wear...