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I didn't get the Dyno but he said it was making 642 on stock fuel system. Of course I haven't seen the tune.
wait, stock as in stock fuel pump and injectors? no meth? did they do the blower, cam install also?
To make several tuning adjustments, they should of caught that the car is running out of fuel, way before making it all the way to redline and 642whp, there's just back to back to back red flags here. I wouldn't trust them to remedy this, they aren't capable. "reputable" is being used loosely here. sorry you had to go through this. but that car needs to go elsewhere, chalk it up as a life lesson. the "fast, cheap, reliable" logic will always apply in this game.
Definitely don't sleeve that block. Look at the pic of the cracked sleeve. The water jacket wall is also cracked. No dice, homie. Time to grab a 4.8 or 5.3, gap those rings, upgrade the fuel and get back at it for cheap.