Well, today is the day that I have now driven my El Camino 300,000 miles.
It only had 41,901 when I bought it and now it is "almost broken in" with 341,901 miles.
It is a better vehicle now that it was back when new. The OEM cooling system was just inadequate. The 2 core radiator was just not enough to keep it cool. The engine would get HOT but I have no idea how hot until I replaced the idiot lights with real OEM style gages. I put in a 3 core high quality radiator and now it stays cool.
The OEM transmission was the POS metric 200 3 speed with lockup. It puked at 70K miles. Now it has a built 2004R with lockup so it is a 4 speed with lockup. The rear end was a peg leg. That is now a limited slip differential. The OEM carb was worthless and that was replaced with throttle body injection. The 305 original went 300K miles with no real issues. The new GM crate engine 350 in it now is much better.
It had a AM-FM crummy radio that is now a MP3 playing with Bluetooth connectivity. The rear view mirror is an automatic dimming mirror with built in compass and outside temperature with three button remote for the garage doors.
There is not a part on the car that I have not improved in some way. Now I am working towards 400K miles!
I have had the Elky since BEFORE I got married.