Nice looking car, enjoy it. Contact Mike Stenhouse at Second strike for the manual. I concur regarding the
oil loss, check your plugs to see if there is any excess
oil on them and for uniformity. If only a couple of plugs, or one side seems to be burning more
oil that may be a sign of an intake gasket leak. In addition to the other things mentioned by others, loosing oil only when the engine is running could be a sign of a leaking valve cover gasket.
You will be amazed at how warm these cars can be with the top and side curtains on. Just watch out for snow and ice.