Blue smoke on take off

Sorry fish, hate to disagree but black is rich and blue is oil.

How old is the build on the engine? Could be the umbrella seals are starting to harden up, they can be changed without pulling the heads. If they are getting old and hard they like to ride on the top of the valves and give oil a chance to run down the guides and will cause you to have more problems later on. The exhaust valves are the ones leaking down because the intake will burn it unless it becomes real bad. Cheap fix now, all you need is the adaptor to put air pressure in the cylinder, an overhead valve spring compressor, a set of seals and probably a set of cover gaskets.