Bernie,
If you like that carb. rebuild it or have it rebuilt. BUT the dist. will be off if you change out all of the old points and plugs and switch the guts to a Petronix electronic ig. I have a GMC 305 V-6 and did the switch for $77.00.
http://www.pertronix.com/My truck starts in about 2 seconds flat or sooner since I switched. The unit is sealed and humid conditions won't affect it (Katrina Flooding aside).
Jake