Done a ton of those modular motors when I was at ford. I did a few heads in the tks,,but my back started hurting to bad so I just started pulling the motors. I can tell you personally that I could do head gaskets in a tk in 3 days with pulling the motor. Now I talked with ford reps before and they told me that lifting the body is never a ford acceptable fix. What the repair shop wants to do is up to them/you BUT if it was me, I wouldn't want the body off for any reason unless it had a 6.0 diesel in it.
So to finish,,those modular motors had head gasket issues. And its a flip of the coin if yours had headgasket issues
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