<div class='quotetop'>QUOTE(clperformance &#064; Sep 27 2006, 02&#58;11 PM) [snapback]66819[/snapback]</div>
Sorry I think I might have posted this int he wrong place last time:

I just desimated my 2001 4.8 4x4 about a month ago with 167,xxx miles on it and now I need a new motor. I&#39;ve been reading about a 1000 different threads just trying to get confirmation about what I&#39;m thinking.

1) are the 4.8&#39;s, 5.3&#39;s, and 6.0&#39;s all the same on the outside? bolt right in?

2) what about wiring? Are all the connectors in the same spot along with wires being long enough to reach? Anything I need to watch for?

3) What is the best thing to do with the ECU?

4) Anything in the future I should be watching out for or I should upgrade now while the motor is out?

Thanks for any and all help guys. I really appreciate it
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ALL THIS INFO IS TO THE BEST OF MY KNOWLEDGE
1. 4.8&#39;s and 5.3&#39;s. Identical. 6.0 is a dif story. Most of the motor mounts on an LQ4 a different. A 4L60E Tranny will not work with a LQ4. Have dif harnesses. It may work with the LQ9. Most 6.0L have oil coolers built into the radiators, which most 5.3L and 4.8L have oil cooler block off plates. You could take the blockoff plate off your 4.8 and put it on the new 6.0.

2. Most of this is the same.

3. 2 words. ALLEN NELSON

4. If you could do a cam and headers now. It will save you the hassle latter when you decide to.