1986 mighty max intermitten spark on 2 and 3.

wont start, using timing light i can see that on cylinders 2 and 3 i'm getting intermitten spark. i've replaced the distributor cap and the coil, no change. I've swapped plug wires from working cylinders and still no change. I inspected the rotar and it looks good. Where should i look next? Thanks

Tried swapping spark plugs from working cylinders, or just replace all plugs? If you do and it still misfires on 2 and 3, prolly the distributor cap needs replacing.

i've swapped plug wires and replaced cap. no change.