If that '83 dizzy is vac only it may act the same as a LOM. Try it with the vac disconnected to get you static timing in the sweet spot. Mine likes 12 deg BTC. I stayed with points because they are easier to fix on road trips an the car is still 6v + ground. If yours seems like its starving with 55 jets go back to the 59s. Just tweak one thing at a time. You will get it where you like it.