For any older Chevy, 9/16", 9/16", and 9/16" grin

Seriously, a set of combination wrenches (box and open end) from 1/2" up to 3/4" would fit just about anything. I sewed up a rollup pouch from some denim (old jeans) with velcro closures. Pretty compact setup.

Or you could go with a couple of adjustable end wrenches (aka Crescent wrenches).

Kevin
1951 Chevy 3100 work truck
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Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.