Start with the basics.There should be a place in your manual that shows you what the spark plugs should look like. White to very light tan = lean. Sooty black =rich. They should be in between those extremes. Really wet oily black means wear in cylinders/rings not sealing and therefore loss of compression, or valve stem leaks. Check the compression. Check the timing. Make sure both mechanical and vacuum advance are working. Check point and plug gap. Make sure your throttle linkage is giving you full throttle on both carbs. One or two little problems can really mess things up. It sounds like you have a cool car and a great learning experience ahead. There are guys here who are willing to help. I wish i'd had access to these guys in the 60s.
