Engine missing on 2 cylinders

I need to pick some brains. Started up my 47 (327 and 3 dueces) and it seems to be missing on 2 cylinders. I have new plugs, wires, coil and a pretty new Unilite dist. When it runs it runs fairly good but seems a little rough, you can smell raw gass out of exhaust. Check temp at headers and all about 180F but cyl # 4 and 6 are about 110F. Pulled off wire of each put plug out side engine and ran and I get spark in plug. Pulled plugs this morning and they seem pretty good???

Any one have any ideas what to look at next.....


Thanks Jeff

 

Not to insult you but the first thing I'd quadruple check is the firing order of the new plug wires in the cap. I think we've all done if we've been around long enough.

 

No, I will take any direction. I usualy find it to be some very basic that I have over looked.

 

Pop the valve covers off,to check for flat cam lobes...broken valve springs,bent pushrods,rocker arms broke,or slipped off...rocker nuts backed off too far?? If the valves are moving ok,then check ignition,wires,dist.cap cracked,broken contacts??...

 

Take a compression test and compare the 2 bad cylinders with the good ones. If the 2 bad ones are much lower then the good ones you found the start to your problem. Then it's rings, valves or head gasket.

 

Maybee a plugged idle circuit in one of the carbs? lean misfire?

 

I was thinking crossed plug wires too. I've done that before and was left scratching my head for hours and did a bunch of unnecessary work. Start with the basic cheap and easy stuff. Hopefully it's something like that. If not, good luck...