I think what you are experiencing is not unusual but whether it is good or bad is a matter of what you are willing to accept. With the quality of machining today and the quality of the right parts, (piston rings, valve guides & seals, etc) even an old engine can be built to high enough standards that it would go many thousands of miles without needing to top up the oil. but an engine needing a quart every 1000 miles can still be expected to go many, many more miles before it would really need a rebuild. If your engine is showing alot of blue smoke from the exhaust pipe during normal driving as in every gear change or alot of blue smoke after some decceleration and then getting on the gas or your oil pressure is noticably below recommendations or there are some noises, then I believe it is a canidate for a rebuild. Absent of these indicators then you might decide to not rebuild it and just keep the oil topped up. I would make sure that all the external gaskets are in good order as they tend to leak a lot. If you do decide to rebuild the engine I think you could see that there are two ways to go about it. Some would do what I call and engine freshening up. This is putting in new parts but doing very little machining. Then there would be a complete rebuild. This is done when a machine shop brings the engine to what would be considered almost a blueprinted status. I would want to line bore the crank journals. resize the rod big ends, balance the rods and proper boring and honing of the cylinders. Also proper work on the valves, seats & guides. With this kind of work, built to street standards not racing standards, you should be able to expect an engine that will use no oil between reasonable oil changes. Just my opinion. Enjoy.