Distributor??

Hey All
So my car Started running a bit rough And Then began having problems with the power surging up and down. When I got home and put the timing gun on I wasn't even getting a spark to the 1st Cylinder...Now this Is a dual points Dist That is crusty and old...And the wires are pretty shot too....I'm assuming it the distributer because of the surging... And tried swapping cables and it still was't firing on 1...So should I Just buy a MSD "ready to run" or Go for a billet DIST with a MSD 6 box????...I was planing on an upgrade at some point..And Im staying with a small block