The 302 isn't covered in any of the light truck manuals but a workshop manual for series 100-500 models will have all the specs. Mine shows the following:
plug gap .030"
points gap .016"
timing 5 degrees BTDC
valve lash intake .012" exhaust .020" (hot)
There's an entire chapter on the Stromberg 2-barrel carb, tell me what you need and I'll see what I can find.