Decided to change the plugs in my '66 with a 240. First time since I bought it.
Sometimes it's a little hard starting and sometimes starts right up. I haven't done any compression or leak down tests yet, but thought I would give everyone something to look at. #s 1 and 3 were horrible but over all the engine runs well......

 

looks like oil fouling. might want to check the valve seals. how many miles on engine and on spark plugs?

 

No idea. I've had the truck for less than 2 years. I have about 8k miles on the truck since I bought it. The block dates to '72. My rpms went up about 175 after changing them. I plan on checking a lot of things when I rebuild the front end in the coming weeks.