I purchased this 1973 240z CA/AZ (one owner car) that's been hibernating for 25 years in a AZ. garage. I am working on waking it up. (See NEW MEMBER - NEW CAR Topic). Work started - Pulled the head, there was a bent push rod and a bad lifter. Sent head off for a rebuild (forgot to take a picture before installing). The timing chain was installed incorrectly in the past (180 degrees off) this would make the car run poorly (as you can imagine). Maybe that's why the PO parked the car in a garage for the last 25 years. The exhaust manifold was cracked all the way through, it couldn't be repaired so I ordered a coated header. Exhaust system from MSA TBC Coated 6-1 Header and MSA Premium Exhaust System. New parts installed - new timing chain, water pump, fuel pump, MSA 60 Amp alternator, and motor mounts. Exhaust came in last week, finishing up the engine and then starting up the engine / car for the first time in 25 years.