TOPIC: 66 evinrude starflite 100 s timing...?

ok guys, i finally got the engine to fire on all 4 cylinders. after replacing my battery terminals due to being old and one of them broke off, and re soldering one of the brushes back to the starter, and adjusting the points to .020 now my question is how do i make sure the engine is in perfect time as it should be. after adjusting the points the engine runs WAY better and smokes so much less then what it was. but it still just has that sound like it is not running at its full and best. if you guys could help i would be greatly appreciated.