Spark Jumping to Headers

please help me two months ago i was inspecting in the night spark plug leaks when i noticed a blue real small Spark Jumping to the Headers from all 8 sparkplugs mostly from spark plug #1, since 2 months ago i have changed the spark plug wire like 5 times and i still get the same problem...its become real expensive replacing the plug wires, dos any body know what could be cussing this problem... i herd from friends that it could be my head valves cussing the problem if they where not properly adjusted ( i had my push rods replaced like six months ago)

i checked the the boot ruber and it looks in good shape, im going to sound like a dum azz but what is aspetos?