What is the point gap on a 1976 Toyota 20r engine?

There isn't a single "point gap" specification for a 1976 Toyota 20R engine. The points gap depends on the ignition system used (points and condenser vs. electronic ignition). Furthermore, even within a points system, the exact gap might vary slightly depending on the specific distributor used.

If it's a points-type ignition system: You'll need to consult your 1976 Toyota 20R's owner's manual or a reputable repair manual for the exact point gap specification. The gap will typically be in the range of 0.016 to 0.018 inches (0.4 to 0.46 mm), but again, check your manual.

If your engine has an electronic ignition system, it will *not* have points, so the question of point gap is irrelevant.