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How much to drop an LS3 into an old hoe?

Posted on 2/24/24 at 10:29 pm
Posted by lsu xman
Member since Oct 2006
15534 posts
Posted on 2/24/24 at 10:29 pm
Looking to pick up a high mileage 2005-2014 Tahoe. I'm seeing many good body ones for $5-12K

New crate LS3, built tranny, fuel pump, harness, the whole shebang with labor too. I got family that can do it, but I'll leave a big tip along with ample food and beer.
Posted by fr33manator
Baton Rouge
Member since Oct 2010
123952 posts
Posted on 2/24/24 at 10:32 pm to


quote:

Old hoe



Tranny

Big tip

Shebang




Giggle
This post was edited on 2/24/24 at 10:34 pm
Posted by biohzrd
Central City
Member since Jan 2010
5602 posts
Posted on 2/24/24 at 10:36 pm to
There are some differences in the harnesses, and other little things. Physically the engine will bolt in just fine. May need to convert all the accessories over to the ls3. Depending on the trans you may have to change out the drive shaft, and cross member.
Posted by Ronaldo Burgundiaz
NWA
Member since Jan 2012
6541 posts
Posted on 2/24/24 at 10:44 pm to
quote:

Looking to pick up a high mileage 2005-2014 Tahoe. I'm seeing many good body ones for $5-12K

New crate LS3, built tranny, fuel pump, harness, the whole shebang with labor too. I got family that can do it, but I'll leave a big tip along with ample food and beer.
This sounds like a fantastic idea.

If you pick up a 2nd job doing porn or dancing or turning tricks you could pick up a low mileage model with good leather.

Have you considered an ‘84 Caprice?
This post was edited on 2/24/24 at 10:47 pm
Posted by Redlos
Baton Rouge
Member since Jul 2005
1044 posts
Posted on 2/24/24 at 11:15 pm to
Why not an LS7?
Posted by BuckyCheese
Member since Jan 2015
48913 posts
Posted on 2/24/24 at 11:16 pm to
quote:

Have you considered an ‘84 Caprice?




I'm half tempted to try and buy this thing;



'87 Custom Cruiser that they put full QA1 suspension with coil overs under.

Stuff a 5.3 LS/6L80 in it, some Brembos off a CTS and have a sweet cruiser.
This post was edited on 2/24/24 at 11:53 pm
Posted by JohnnyKilroy
Cajun Navy Vice Admiral
Member since Oct 2012
35289 posts
Posted on 2/24/24 at 11:23 pm to
You would need to replace the transmission too. Those aren't built to handle to torque that an LS will make.
Posted by BuckyCheese
Member since Jan 2015
48913 posts
Posted on 2/25/24 at 12:11 am to
quote:

There are some differences in the harnesses, and other little things. Physically the engine will bolt in just fine. May need to convert all the accessories over to the ls3. Depending on the trans you may have to change out the drive shaft, and cross member.



Seems it would be easier to just throw a cam, and maybe some heads, at the 5.3 that is already in the truck. Or swap in a 6.0 from the same generation.

A crate LS3 isn't anything special.
Posted by 32footsteps
Member since Oct 2017
271 posts
Posted on 2/25/24 at 12:24 am to
quote:

A crate LS3 isn't anything special.


^This.

You’d have a standard grocery getter throwing that engine in the thing. It ‘could’ be made more fun with it but you’d have to throw extra attention at the gears and transmission to get it there.
Posted by WillieD
Lafayette/BR
Member since Apr 2014
2011 posts
Posted on 2/25/24 at 12:26 am to
350
Posted by SmokePurpleLiveGold2
Baton Rouge
Member since Nov 2014
368 posts
Posted on 2/25/24 at 12:51 am to
Lot of money to not be as fast as the newer 6.2L’s stock
Posted by SPEEDY
2005 Tiger Smack Poster of the Year
Member since Dec 2003
83347 posts
Posted on 2/25/24 at 2:18 am to
quote:

built tranny


Posted by Dragula
Laguna Seca
Member since Jun 2020
4871 posts
Posted on 2/25/24 at 4:23 am to
(no message)
This post was edited on 2/25/24 at 5:29 am
Posted by Haplochrom
Member since Aug 2006
4013 posts
Posted on 2/25/24 at 7:58 am to
Rebuilt 4.8/5.3 with a hot cam is under $2500 if you do it yourself and you can make the same horsepower as a “stock” 6.2 LS.

If you go to a newer 6.2 LT that stuff is more advanced than LS on cam timing/oil squirters/cylinder drop/direct injection.

I am fine buying 4.8 that never had those features for $250/ea at junk yards and using the extra money for power adders.

People want a 6.2 for the name but that low end torque is what crushes stock transmissions. Softer low end of a 4.8 and a better converter can make a trans last longer with the exact same hp numbers on a dyno.
Posted by WonPercent
BATON ROUGE
Member since Aug 2023
420 posts
Posted on 2/25/24 at 9:43 am to
Sry, I only mess with young hoes.
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