1965 Other Chevrolet Models 1965 Corvair

Engine Mechanical problem
1965 Other Chevrolet Models 6 cyl Wheel Drive Type unknown Automatic 50,000 miles

I have a corvair that has blue smoke when you just start it and for a bit afterward, which seems to clear up after driving it more than 30 min. If it was the piston rings, wouldn't this get worse not better? Do you have to drop the engine to do a ring job?