Mine has 361K miles. Runs great. Original engine with only the head gasket replaced at 250K. It's had 4 timing belts, 3 water pumps, and on its second clutch. The 5 spd trans was rebuilt at 280K due to 5th gear noise.
I started using Royal Purple oil at 200K and had to replace all the seals due to leaks. That stuff really cleans your engine out. I change oil every 12K miles and use mobil 1 filters. I have access to oil analyzing equipment and this tells me when the oil viscosity and particle count is getting to the point it needs to be changed. I also have a pre-oiling system using an oil accumulator and solenoid valve that I use to build oil pressure to 40 psig before starting the car.
It still gets 34 mpg. I've removed the power steering and converted it to manual, removed the air conditioner, installed a MSD 6A ignition and coil, removed all vacuum lines, installed manual choke, and manual secondary on the carb. The EGR has been removed and the ports on the stock intake have been machined off so it looks like an after market intake.
I don't hotrod it as it is my work car. My next project is doing away with the distributor and building a crank fire ignition from EDIS components and Megajolt Lite Jr to control it and spark advance settings.
Update: my car now has 482k miles and is still going strong. I got rid of the distributor 5 years ago and installed the Megajolt Lite Jr and it works awesome.
Update: my car now has over 500k miles and is still going strong.
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