Complete JDM's are <$1000. I'm running one now. Bought it w/ 135psi on all 6. When it becomes a problem it's going to the recycler. I pulled one down w appx 175k on it and I could still see the cross hatch markings on the cylinder walls.These are basically 300k engines with minor maintenance. Most will show signs of an oil leak adjacent to the oil filter. There's an O-ring that wears out. Takes about 20 minutes to change and cost $13. If you were to do a timing chain job your out about $500 including tensioners and guides.