5.3 or 6.0 into 4.8 just a few ?'s, newb needing confirmation

[Red03SilSS]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Sep 28 2006, 03&#58;12 PM) [snapback]66994[/snapback]</div>

Sorry, but me taking a sledge hammer and pounding the crap out of a Rolex doesn&#39;t make me a Swiss watch maker.
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[TXsilverado]

pretty sure i already know the answer to this one but my 5.7 ls1 is guna slip on into my 4l60e and just drop in on my old mounts and harness right?

[RedHeartbeat]

It will bolt in. As for the harness, you&#39;ll need to swap over your original intake and accessories from the old engine onto the new engine. You&#39;ll need to swap out the harmonic balancer, also. Yes, water pump needs to come over from the truck engine, too. Basically, you&#39;ll be swapping out the long block and keeping your intake and accessories.

[geestyle4]

i have a 2001 rcsb 5.3 2wd so a what will slip in with no wiring issues

[Jamest]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; Sep 27 2006, 06&#58;28 PM) [snapback]66864[/snapback]</div>

4.8, 5.3 and 6.0 engines will interchange with the exception of the 1999-2001 6.0L which had a thicker flange on the crankshaft. Buy a 2002 or newer 6.0L and everything will swap from your 4.8L. Be prepared to get your transmission beefed up. Also, budget some money for a tune since your 4.8L tune will work but it will run very lean. Nelson Performance can set you up with a tune for the 5.3 or 6.0 engine. Use your stock 4.8L harness unless the 5.3 or 6.0 engine comes with a 4L60E harness.

Red, you guys just did everything wrong when you swapped that 4.3L out for the 6.0L.
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Reds right my 2000 6.oL has a thick flange on the rear of the crank. GM had a brain fart when they did this. It will all fit as Red has mentioned.
Good Luck&#33;

Jamest