300K is really impressive. Those Chevy 4.3s run forever with just a little maintenance. Im a Ford guy but you cant deny the 90s GM V6 and large V8. I use to own a 92 Pontiac Trans Sport (The Dust Buster) with the 3.1 V6. No exhaust, started MOST of the time, no power steering, windows worked sometimes, and the oil pump worked when it felt like it. **** thing died with over 280,000 miles on it.