I'm sure every engine is different, but on our L-6's we've been told about 50 hours between full rebuilds. We will replace the valve springs at the beginning of every season, but don't otherwise do anything else outside of plugs regularly. And outside of the engine that came with our car which was an unknown, we haven't had a major engine issue in 5 years of running our car.
Chris Carey
Central Florida Region
ITS/Vintage Datsun 240Z
Favorite tool to remove undercoating---- A curb!
"Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
Horsepower is how fast you hit the wall, torque is how far you take the wall with you."
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