So I started working on my '73 Sportsroof that I bought a few years ago. Its all original with about 79,000 miles. The original owner said she stopped driving it but she would start it and run it around the block sometimes. she did this for about 6 years untill the battery dies then she stopped and parked it. I took off the valve covers to look inside and found that she never changed the oil. Everything was sludged up. I took off the intake and found that this engine was equipped with special push rods that go around obstructions. I guess I have more work to do.....