Had the same problem with my 1655 last year.  Mine was a condenser issue, but replaced points and coil as well - but the condenser was the main issue.  Make sure if you get new points they are for the Mallory distributor - NAPA and others will sell you &quot;what the book says&quot; and that's not what the Mallory points are.  I'm thinking about going electronic ignition - get rid of the problem once and for all.  Good luck.