LS Swap in 4x4 71 longbed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JDO AK · 02-06-2017, 09:15 PM

I just bought my second C10 and this one is for my son. I'm planning a LS swap and would like to know what kind of suggestions people have on a few things

Looking for better gas mileage
Looking for reliability

I was thinking a 5.3 or 4.8 with a 4L60 is this a good choice?

Also will a T-case from a earliy 2000 motor tranny 4x4 work as well as long as I use a manual shift?

I wanted to change the 4:10 rear end to 3:73 posi any options either way?

Thanks,

Justin

57taskforce · 02-06-2017, 11:22 PM

Can't help you on the ls swap but the transfer case is a no go if you've got a Chevy front axle under it. With The later cases the front driveshaft drops on the wrong side.

bs46488 · 02-07-2017, 01:29 PM

Justin,

I did an LS swap in another project.

The biggest factor for me was what I could easily find available. I ended up with a 5.3 with 4L60 and ECU pull out. I followed the instructions on lt1swap.com for the wiring harness and had no problems.

It fires up and goes straight to idle every single time.

02-06-2017, 09:15 PM	#1
JDO AK Registered User Join Date: Feb 2017 Location: Anchorage Posts: 1	LS Swap in 4x4 71 longbed I just bought my second C10 and this one is for my son. I'm planning a LS swap and would like to know what kind of suggestions people have on a few things Looking for better gas mileage Looking for reliability I was thinking a 5.3 or 4.8 with a 4L60 is this a good choice? Also will a T-case from a earliy 2000 motor tranny 4x4 work as well as long as I use a manual shift? I wanted to change the 4:10 rear end to 3:73 posi any options either way? Thanks, Justin

02-06-2017, 11:22 PM	#2
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,485	Re: LS Swap in 4x4 71 longbed Can't help you on the ls swap but the transfer case is a no go if you've got a Chevy front axle under it. With The later cases the front driveshaft drops on the wrong side. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

02-07-2017, 01:29 PM	#3
bs46488 Registered User Join Date: May 2014 Location: San Diego, CA Posts: 547	Re: LS Swap in 4x4 71 longbed Justin, I did an LS swap in another project. The biggest factor for me was what I could easily find available. I ended up with a 5.3 with 4L60 and ECU pull out. I followed the instructions on lt1swap.com for the wiring harness and had no problems. It fires up and goes straight to idle every single time. __________________ Project Engine Stand 1972 SWB conversion: http://67-72chevytrucks.com/vboard/s...d.php?t=673914 1970 Nova: http://67-72chevytrucks.com/vboard/s...d.php?t=708161

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