I bought a 7.3 turbo complete drop in motor for just under 7000 dollars.
Blew three of them up in 28,000 miles.
I tore the fourth one down before I installed it since my warranty was almost up.
By the time the heads came off, I refused to install the engine.
Intake bolts stripped out.
Exhaust manifold bolts broken or stripped.
Sleeves dropping down in the block, and the engine had never been started.
The sleeves are what the fire ring sits on, so since the sleeves dropped, the head bolts were not at anywhere near the correct torque values.
Several gaskets had extra holes in them where they punched bolts through the gaskets that were misalligned.
I did all of the disassembly and reassembly myself.
Just took what was needed to the machine shop to get what I wanted done to it.
I am running almost four times the boost of the reman engines, lots more RPM's, lots more fuel.
Off the top of my head, 75,000 miles or so and still going strong.
I have developed an oil leak I need to track down, but it's way to cold and way to snowy to worry about that right now.
Matter of fact, I gotta go fire the beast up and go plow right now.