Do note that v-brake arms rarely pivot against the post directly. There's usually a bushing in the arm that the arm pivots around, then the bushing is clamped tight against the post.
You need a really runny lube if you want it to get in between brake arm and bushing. Greasing the post is functionally pointless, but might make removal easier.

V-brake levers as a rule has 35 mm or more between the "hinge" for the lever, and where the cable attaches. Easy enough to measure.