Besides all the usual working items you need to have on hand while restoring old cars, such as an endless supply of those blue workshop towels, cheap red rags and that white hand goop, a variety of fasteners will make the project proceed much quicker, and give your restored car a more professional appearance.

Having access to different sized nuts, washers and bolts will prevent you from running down to the auto parts store every time you need one, and will ensure that the car's newly installed parts will not only look better with new nuts and washers on them but will be fastened much more securely, especially when you use new lock washers.

Like most garages I've got a few of those multi-drawer parts bins with the little clear plastic trays.

Get a fast lesson in fasteners on Hemmings.