71 C10 lq4 carb swap

[toezdeep]

Hey guys,
First off, great forum. Now on to the good stuff. I have a 71 C10 and I'm going to put a "06" 6.0 lq4 motor in it, carburated, and I was wondering if there are major issues I should be aware of. Any help is much appreciated. Pics will be up soon
thanks
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[ole dollor]

first let me say welcome from Texas....you have picked a great forum to join. second is i can't help you with the new stuff. but someone will chime in that can.....

[dec010974]

hello to all. happy holidays. toezdeep, im trying to complete the same swap. i havent had many issues due to the fact that i research b4 i start any build. this is my 3rd lsx swap into chevy trucks. all were sold soon after they were completed. this my first carbed lsx. its really an easy swap. first things first, the motor must mounted in the engine bay. next there's fuel and spark. the engine petroleumin the combustion cycle to run. put the wheels to the ground and burn some rubber. if its something specific, ask away. lsx swaps are basically, custom swaps. there will be issues along the way but once its complete, youll be glad you did it. here r some pics. im in the wiring stage. i want everything to be neat. this is gonna be a rat rod. no flare, just muscle.

[trac209]

those engines look way too cool with an old school carb on top

[toezdeep]

Those swap look clean you do good work. Did the motor mounts line up ? What Sid you use for a trans?
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[dec010974]

hello toezdeep. yes it did. i used the 67-72, c10 v8 frame mounts that connects to the first two holes on the frame rails. i bolted swaptech adapter plates to the lq4 and used stock motors mounts(a2282). its sits nice. im gonna run a th400 trans with 2400 stall. the camshaft is a gm hot cam. its should make around 450 hp. there is a thread that lead me to pick that camshaft. it should make good power. pm me for later. i should have mor pice soon. im currently cleanig up the wiring such as lights msd dox, soldering wires, test fitting everything b4 i attempt assemble for good. btw this gonna be a rat rod so the body will be kinda rough.

[dec010974]

hello to all. here is an update toezdeep. as i attempt this swap i am updating/rewiring the vehicle also. that whats costing me extra time. also this swap may take a different direction if i get my hands on some extra cash. the carbed lq4 will get dropped if i can find a good deal on a 5.3/4l60e. i luve those engines. i can have the best of everything the lsx has to offer. this lq4/th400 swap is a gas thirsty, show the boys what i can do, im smarter than you, with big cahonnas build. here r some pics.

[toezdeep]

I bought the truck for $125.00. The motor is out of a 06 Denali with 78k. I payed 800.00 for it. I'm hoping after the very mild body work that it needs. I'm hoping to be into it for about 5k tops. It's going to get a mild 224 Texas speed cam, springs, retainers and New head gaskets. And that's it. I already have a 750 carb from the motor that was in the truck. I'm pretty pumped. Can't wait to turn the key and hear that thing purrr
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[toezdeep]

http://db.tt/lPhh8VTL

[toezdeep]

I'm going to be ordering my intake and ignition soon. Had to wait till the holidays were over. Im un-decided on ordering the edelbrock intake and ignition kit or the gm performance intake manifold and the MSD ignition. It's cheaper to order the kit, but I'm not completely sold on the edelbrock ignition. The car craft article that gave me the idea used the gm performance intake and the MSD/LS6 ignition. With a mild gm performance cam, equal to the Texas speed cam I'm using with a turbo 400 trans behind it, it made 488 hp and, I believe, 468 torque. I don't want to pinch pennies and sacrifice performance. If anybody has any info from experience, please chime in. Working on photos. Kinda new to this forum stuff, but super pumped.
Thanks guys

[MARKDTN]

Is there a particular reason to carb it? I will never see the logic in carbing an LSx engine. The runners are flat and there has to be issues with fuel puddling. These were made to be FI. Sounds like you have most of the FI. Why not keep the FI? Just curious.

[LEEVON]

The edelbrock ignition box does not have enough timing. The MSD 6010 is what you want.

[no moa]

Nice swap.
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[dec010974]

MARKDTN, when someone asks me why am i doing something, I ask them: why not". I have completed 3 lsx swaps that were FI swaps. Again why not. the motor, tranny, fuel pump was all the stuff i had in my garage, i wanted to use. if my bud comes thru with a
4l60e, he wants to give me, i will switch to FI. in the mean time.

[Dale_Brown]

Looks great so far!

Is the wiring a custon job or does someone make a kit?
Will the TH 400 bolt up? Adapator?

[dec010974]

Toezdeep, if you dont mind, im gonna respond to Dale Brown. Dale, im cleaning up my wiring in my engine bay 'cause i like things a certain way. the previous owner really botched the wiring plus i removed the external regulator. Dale you'll need a flex plate adapter to attach a older style tranny(th400 orth350) to Lsx motors. if you google lsx flex plate adapter, information should pop up. i hope this helps. keep wrenchin'

[toezdeep]

the reason for going carb, easier than fi, wanted to do carb swap first, then possibly go to fi after. i still have the harness from the vehicle that the motor came out of. i am worried about the tranny situation. im going with the t-56 6 speed but i have a bench seat. i dont know if it will interfere with the shifter placement and i am not loosing the bench seat. i will stick with the 4 speed and get the adapter plate instead, i will have to do a set of gears. the 4.56's just wont cut it. as far as the ignition is concerned, i am going with the msd/ls6 box. plug and play, very simple and user friendly, according to car craft magizine. thanks for all the imput guys, you have all been a big help

[jocko]

Originally Posted by dec010974

MARKDTN, when someone asks me why am i doing something, I ask them: why not". I have completed 3 lsx swaps that were FI swaps. Again why not. the motor, tranny, fuel pump was all the stuff i had in my garage, i wanted to use. if my bud comes thru with a
4l60e, he wants to give me, i will switch to FI. in the mean time.

Any concern with the fuze block being exposed to the elements behind the grille and in front of the core support like that? Not that you'll be driving in many rainstorms, but that would be a concern it seems. Access is easy though, so that's nice. Good looking truck btw - and a great looking swap. I do like the idea of a carb'ed LQ or LS motor in these trucks, makes a GREAT driver.

[dec010974]

jocko, im glad you caught that because i missed it. just kidding. i put fuse there for the time being just to get it running(it works). at this time im looking to go another route and reroute the fuses. i know what i want to do but everything cost $$$$$. most of the stuff on this build is stuff i had laying around in the garage or found at the junk yard. i have a factory fuse box/relay center, that i want to use but it will need a mmajor rewire. keep wrenchin'

[68Stepbed]

OK, I'm a couple days late here, but I've done a similar swap in my 68. I did a carbed LS1 mated to a 700R4. That 06 block probably has the 58x reluctor wheel which means you will need the MSD 6012 ignition controller. The early engines had 24x reluctors and use the 6010. The MSD is better form the aspect that you can custom tune them with a PC or laptop. The Edelbrock/GM version aren't able to be customized.

As for mating the TH400 to an LSx engine, check out www.ls1tech.com Some of the 6.0 engines have a different flexplate and don't need the adapter. You just need to research to find out what you need for sure. There's also some good deals on used parts in the classifieds section there. The "Carbureted LSx" section also has it's own classified section just for carbed applications. There's a couple good deals on intakes in there right now.

Also check out the "LSx Swaps" subforum in the "Engines & Drivetrain" section on this board. Lots of swap info there to look through.

BTW, here's a pic of my swap.

[steelhorse]

Clean looking engine 68stepbed.

[dec010974]

toezdeep where are you? 68stepbed, that is a very clean swap. i'm assuming that you truck was complety torn down. im definitly impressed. too bad i dont have the coins for that.

[jocko]

Originally Posted by dec010974

jocko, im glad you caught that because i missed it. just kidding. i put fuse there for the time being just to get it running(it works). at this time im looking to go another route and reroute the fuses. i know what i want to do but everything cost $$$$$. most of the stuff on this build is stuff i had laying around in the garage or found at the junk yard. i have a factory fuse box/relay center, that i want to use but it will need a mmajor rewire. keep wrenchin'

Ha, got it! Knew there had to be a reason.

[68Stepbed]

Originally Posted by dec010974

toezdeep where are you? 68stepbed, that is a very clean swap. i'm assuming that you truck was complety torn down. im definitly impressed. too bad i dont have the coins for that.

No, the truck was painted and built back in 06. In August of 2011, I burnt up the 350 I had in it. I found the LS1 last January and got it all back up and running by this past August. The only thing I removed was the hood to do the swap.

[toezdeep]

I live in fall river, mass