What brand of points did you use? Most new stuff including from Napa are junque. Weak springs, crappy can rubbing block, no oil wick for lube, miss aligned points, crappy material for contacts. Did this condition exist before you replaced points? Do you still have the old ones? I would put them back in and see it it will rev better. The other thing to check is the thin flexible wire that supplies the points with power from the coil terminal of the dist. This wire can sometime have insulation fall off allowing an inadvertantly ground before the points, or it will look good on the exterior but be separated within the insulation it is very important to proper running through the full rpm range. With positive ground make sure your coil is wired ignitionignition to neg terminal, positive terminal to dist.