help 1964 Slant 6 tune ups specs

Just guessing but idle is likely in the 600 rpm range. For setting choke idle I always unscrew the choke idle screw and put it on the smallest step of the plate and tighten the screw until idle just barely speeds up. Make sure you do this with the engine warm.

Plug gap will depend on what electronic ignition and plugs you are using. on the issue of the spammer, I believe FABO had a virus or hacker yesterday most threads had some wierd spam on them.