LS 5.3 with carb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74 stepside · 03-12-2012, 01:04 AM

I searched before Im asking. Didnt find what I needed. My question is, has anyone done the LS swap with a carb and a turbo 400 trans? Im planning on pulling my 350 out for a rebuild but I have the chance to get a 40k mile 5.3, already have the carb and trans. What Im looking for is any info on this set ups performance and maybe info on trans swap. Truck is 73 c10 shortbed. Thanks, Matt

INSIDIOUS '86 · 03-12-2012, 02:11 AM

I believe there needs to be a spacer on the flywheel due to the fact the crank hub on back is flush with the block and .400 shorter than a gen 1 sbc. As for the carb. Edelbrock sells a intake with a msd controller and carb style intake.

By all means if you already have the th400 stay with it for budget but the amount it will take to go carbed will be about the same as a computer setup minus cold starts and tuning and lower efficiency (unless your a carbaholic super tuning wizard) if your trying to go for the old school look with new school tech then I can see why carb is your plan.
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74 stepside · 03-12-2012, 02:17 AM

Thanks, the 5.3 is just a long block without fuel injection, as far as I know. But I do like the carb set up the way it looks, etc. Ill check it out tomorrow.

gchemist · 03-12-2012, 02:41 AM

Go to www.jegs.com for a kit. You'll find an intake and ignition control module. You can run it with a distributor (a lot of work) or individual coil packs (best option)
http://www.jegs.com/c/Intake-Manifol...11939/10002/-1

Here is the article for both distributor and coil pack conversions.
http://www.aera.org/ep/downloads/ep1...2010_10-19.pdf

It's easier than you think.

andrewmp6 · 03-12-2012, 05:32 AM

The distributor kit i have seen said it only works on a aluminum block and i think the 5.3 is a iron block.

Pop's C-10 · 03-12-2012, 06:58 AM

Tha edelbrock set up looks much cleaner...a dizzy hanging off tha front of a LS looks goofy to me..

andrewmp6 · 03-12-2012, 09:41 AM

I seen holley makes coil covers that make it look like a big block.

79gmcc15 · 03-12-2012, 03:16 PM

Check out the "lsx" forum in the engine and drive train section of the bored. Lots of info their for you too.

74 stepside · 03-12-2012, 05:36 PM

Well I looked up the intake and ignition combo and found out it is a little pricey. I think Im going to just stick with my sbc for now. After wheels and paint then Ill think about the LS swap. Thaks for the replies and help.

03-12-2012, 01:04 AM	#1
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	LS 5.3 with carb I searched before Im asking. Didnt find what I needed. My question is, has anyone done the LS swap with a carb and a turbo 400 trans? Im planning on pulling my 350 out for a rebuild but I have the chance to get a 40k mile 5.3, already have the carb and trans. What Im looking for is any info on this set ups performance and maybe info on trans swap. Truck is 73 c10 shortbed. Thanks, Matt Last edited by 74 stepside; 03-12-2012 at 01:52 AM. Reason: Added extra question.

03-12-2012, 02:11 AM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: LS 5.3 with carb I believe there needs to be a spacer on the flywheel due to the fact the crank hub on back is flush with the block and .400 shorter than a gen 1 sbc. As for the carb. Edelbrock sells a intake with a msd controller and carb style intake. By all means if you already have the th400 stay with it for budget but the amount it will take to go carbed will be about the same as a computer setup minus cold starts and tuning and lower efficiency (unless your a carbaholic super tuning wizard) if your trying to go for the old school look with new school tech then I can see why carb is your plan. Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

03-12-2012, 02:17 AM	#3
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Re: LS 5.3 with carb Thanks, the 5.3 is just a long block without fuel injection, as far as I know. But I do like the carb set up the way it looks, etc. Ill check it out tomorrow.

03-12-2012, 02:41 AM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: LS 5.3 with carb Go to www.jegs.com for a kit. You'll find an intake and ignition control module. You can run it with a distributor (a lot of work) or individual coil packs (best option) http://www.jegs.com/c/Intake-Manifol...11939/10002/-1 Here is the article for both distributor and coil pack conversions. http://www.aera.org/ep/downloads/ep1...2010_10-19.pdf It's easier than you think. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-12-2012, 05:32 AM	#5
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: LS 5.3 with carb The distributor kit i have seen said it only works on a aluminum block and i think the 5.3 is a iron block.

03-12-2012, 06:58 AM	#6
Pop's C-10 Registered User Join Date: Jul 2010 Location: memphis Posts: 2,537	Re: LS 5.3 with carb Tha edelbrock set up looks much cleaner...a dizzy hanging off tha front of a LS looks goofy to me.. __________________ 1981 C-10 (Pop's) 1978 Camaro 2006 Lacrosse

03-12-2012, 09:41 AM	#7
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: LS 5.3 with carb I seen holley makes coil covers that make it look like a big block.

03-12-2012, 03:16 PM	#8
79gmcc15 Gettin It One Pice At A Time Join Date: Oct 2004 Location: everett, washington Posts: 2,688	Re: LS 5.3 with carb Check out the "lsx" forum in the engine and drive train section of the bored. Lots of info their for you too. __________________ RIP ELJAY Work In Progress 1979 GMC C1500 Trailering Special. Getting the truck done, one piece at a time. “You can tell a lot about a fellow’s character by his way of eating jellybeans.”Ronald Reagan “I don’t know the key to success but I know the key to failure is trying to please everybody.” Bill Cosby

03-12-2012, 05:36 PM	#9
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Re: LS 5.3 with carb Well I looked up the intake and ignition combo and found out it is a little pricey. I think Im going to just stick with my sbc for now. After wheels and paint then Ill think about the LS swap. Thaks for the replies and help.



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