92' 360 wont fire.

Well all the wires are correct, and I checked the firing order about 10 times today, and same thing. I pulled the number one plug and got great spark, the #4 plug and the spark was there but real weak. I honestly dont know, it did this to us when we first installed the engine and we ended up replacing the distributer and it started. But I looked at the cap and its starting to burn around the terminals, does this mean the wires are posing to much resistance? Could that be the whole problem? They are accel wires so they arnt top of the line, but I dunno its the weak spark on some cylinders that concerns me.