Chevrolet: 73 Chevy HEI random non-starts, point gap, hei distributor

Question
I've got a 72 chev p/u with a 73 HEI distributor that won't start; I've got no spark at the plug, but plenty of fuel. This started 6 months ago, and I've replaced the fusable link (it was corroded through), the condenser (it's called something different with HEI, but it's got a condenser on it), and the ignition coil (the thing on the dist cap) two times. Do I just pony up for the one remaining part I haven't replaced (ignition module), or is there something else? It seems odd that I'll replace something, it will start 1/2 a dozen times, and then it won't start again.  

Answer
Juston;
 did you just put in the dist. ? or did it run after it was put in. it could be in wrong if it was never started after it was put in. or if it did run but will not now, I would check the point gap, clean all of the cap contacts and rotor. prior to a module. rheostat also. check all confections. ok