I also have a 1967 150, gas. I really like this tractor. Few points
1. IPTO, engage slowly at idle speed then increase RPM, Should I say shear pins?
2. The lift cover must come off to clean the pumps (2) intakes.
3. Power steering is great, but, linkage for spool valve must be tight.
4. Power steering hoses fittings are inverted flare, like auto brake lines.
5. Power steering fluid loss? It's going into engine via pump shaft seal.