considering a 6.2 in my 68? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ncsurveyor · 05-12-2020, 10:46 AM

I've found a local junkyard that has a 5.3 with 4l60 trans, complete system for $1750 and also a 6.2 that i'm thinking I could pair with a 4l80, complete package with transmission for $3750. I'm leaning toward the 6.2. Any issues that I may not be aware of that I should consider before pulling the trigger? Would the $2000 difference be worth it in terms of felt power/enjoyment, value?

**1971Stepside** · 05-12-2020, 10:59 AM

If I could have found a 6.2 I would have for sure bought it over my 6.0. I'm assuming mileage is better on the 6.2 as well? I think you will be glad you spent the extra money now. You can always get the 5.3 up in power by spending that 2k on it, but if you can swing it I would go with the bigger displacement from the start. Just my 2 cents.

71gmcC15 · 05-12-2020, 11:01 AM

Oo. I thought your ment 6.2 diesel. Dang that would be cool.

ncsurveyor · 05-12-2020, 11:15 AM

I just didn't know if there would be any issues with it fitting or using the 4l80 transmission. I'm not sure about gas mileage, i'm not that worried about that. It'll just be more of a weekend/play truck and i'm not building it to save gas. My only other concern is my truck is a stepside and i'm afraid the widest wheel I can put on it is an 8.5. Will this be enough tire for a motor that size?

67C10Step · 05-12-2020, 11:21 AM

Quote:

Originally Posted by ncsurveyor

I just didn't know if there would be any issues with it fitting or using the 4l80 transmission. I'm not sure about gas mileage, i'm not that worried about that. It'll just be more of a weekend/play truck and i'm not building it to save gas. My only other concern is my truck is a stepside and i'm afraid the widest wheel I can put on it is an 8.5. Will this be enough tire for a motor that size?

I'd say a 255 (10") to 275 (10.8") wide tire can fit on an 8.5" wide wheel pretty easily. Tire selection is key and it will depend upon gear ratio along with open diff, limited slip, posi? Are you concerned about traction out back with the power the 6.2 should provide? I don't think it will be a huge concern as long as you take it easy on those lead toes and ball bearing ankle.

**1971Stepside** · 05-12-2020, 11:32 AM

It will fit like it was meant to be there. I have a stepper and I am running 9.5" wheels with 275's. I know a 285 will fit, but I couldn't find them in 18" size. Tires won't last long with that motor, so don't get attached to them

These trucks don't have enough weight in the rear to allow a one inch wider tire to help that much when hooked to much HP.

I have the 6.0 with a 4L80. I'm not sure what issues you will run into mating them together. Check in the LS Swap section of the forum and you can find about anything you need to do one of these.

ncsurveyor · 05-12-2020, 11:41 AM

Quote:

Originally Posted by 1971Stepside

It will fit like it was meant to be there. I have a stepper and I am running 9.5" wheels with 275's. I know a 285 will fit, but I couldn't find them in 18" size. Tires won't last long with that motor, so don't get attached to them

These trucks don't have enough weight in the rear to allow a one inch wider tire to help that much when hooked to much HP.

I have the 6.0 with a 4L80. I'm not sure what issues you will run into mating them together. Check in the LS Swap section of the forum and you can find about anything you need to do one of these.

I think i've got the short rear end with it being a 68 so i'm not sure a 9.5 wheel will fit. I'm being told a 10" definitely will not fit on the stepside and with the wheels I like (Ridler 695s), they only come in 8.5 or 10" so i'm assuming i'll need to go with 8.5 all the way around.

LS short box · 05-12-2020, 04:36 PM

I'd do the 6.2 in a heartbeat. More cubes. It will have the good L92 heads. Most had VVT and some had DOD. It's a toss up on the VVT. Some delete it some don't. Everyone seems to delete the DOD.
Texas Speed makes a nice kit to delete VVT. A small cam (225I/230E) really wakes up these engines. If it has a bunch of miles I'd compression check it and pull the timing cover and replace the oil pump and timing chain. Also if its sat for some time I would pull the injectors and have them cleaned.
Good luck with your project.

Custom 68 · 05-13-2020, 09:56 AM

What year is the 6.2?

ncsurveyor · 05-13-2020, 12:21 PM

Quote:

Originally Posted by Custom 68

What year is the 6.2?

Its a 2011

**MDPotter** · 05-13-2020, 01:07 PM

I would go for the 6.2. I had a 2011 GMC with the 6.2 and it was a hot-running truck, kind of wish I had kept it. Aluminum block, greater displacement, much more HP (85 more) in stock form than the 5.3.

ncsurveyor · 05-21-2020, 10:46 PM

Go big or go home right?

Custom 68 · 05-22-2020, 09:06 AM

You wont regret it!
Dave

**MDPotter** · 05-22-2020, 09:31 AM

You made the right choice!

05-12-2020, 10:46 AM	#1
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	considering a 6.2 in my 68? I've found a local junkyard that has a 5.3 with 4l60 trans, complete system for $1750 and also a 6.2 that i'm thinking I could pair with a 4l80, complete package with transmission for $3750. I'm leaning toward the 6.2. Any issues that I may not be aware of that I should consider before pulling the trigger? Would the $2000 difference be worth it in terms of felt power/enjoyment, value?

05-12-2020, 10:59 AM	#2
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	Re: considering a 6.2 in my 68? If I could have found a 6.2 I would have for sure bought it over my 6.0. I'm assuming mileage is better on the 6.2 as well? I think you will be glad you spent the extra money now. You can always get the 5.3 up in power by spending that 2k on it, but if you can swing it I would go with the bigger displacement from the start. Just my 2 cents. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

05-12-2020, 11:01 AM	#3
71gmcC15 Registered User Join Date: Feb 2018 Location: Doland SD Posts: 836	Re: considering a 6.2 in my 68? Oo. I thought your ment 6.2 diesel. Dang that would be cool. __________________ ( second times the charm) 71 gmc c15 307 sbc 373 rear gears positrac sm 465 trans. ( not listed on spid but is original ) 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green)

05-12-2020, 11:15 AM	#4
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	Re: considering a 6.2 in my 68? I just didn't know if there would be any issues with it fitting or using the 4l80 transmission. I'm not sure about gas mileage, i'm not that worried about that. It'll just be more of a weekend/play truck and i'm not building it to save gas. My only other concern is my truck is a stepside and i'm afraid the widest wheel I can put on it is an 8.5. Will this be enough tire for a motor that size?

05-12-2020, 11:32 AM	#6
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	Re: considering a 6.2 in my 68? It will fit like it was meant to be there. I have a stepper and I am running 9.5" wheels with 275's. I know a 285 will fit, but I couldn't find them in 18" size. Tires won't last long with that motor, so don't get attached to them These trucks don't have enough weight in the rear to allow a one inch wider tire to help that much when hooked to much HP. I have the 6.0 with a 4L80. I'm not sure what issues you will run into mating them together. Check in the LS Swap section of the forum and you can find about anything you need to do one of these. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

05-12-2020, 04:36 PM	#8
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	Re: considering a 6.2 in my 68? I'd do the 6.2 in a heartbeat. More cubes. It will have the good L92 heads. Most had VVT and some had DOD. It's a toss up on the VVT. Some delete it some don't. Everyone seems to delete the DOD. Texas Speed makes a nice kit to delete VVT. A small cam (225I/230E) really wakes up these engines. If it has a bunch of miles I'd compression check it and pull the timing cover and replace the oil pump and timing chain. Also if its sat for some time I would pull the injectors and have them cleaned. Good luck with your project.

05-13-2020, 09:56 AM	#9
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: considering a 6.2 in my 68? What year is the 6.2? __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

05-13-2020, 01:07 PM	#11
MDPotter Senior Member Join Date: Aug 2018 Location: Western Colorado Posts: 1,165	Re: considering a 6.2 in my 68? I would go for the 6.2. I had a 2011 GMC with the 6.2 and it was a hot-running truck, kind of wish I had kept it. Aluminum block, greater displacement, much more HP (85 more) in stock form than the 5.3. __________________ 1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax

05-21-2020, 10:46 PM	#12
ncsurveyor Registered User Join Date: Feb 2020 Location: Lenoir NC Posts: 110	Re: considering a 6.2 in my 68? Go big or go home right? Attached Images

05-22-2020, 09:06 AM	#13
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: considering a 6.2 in my 68? You wont regret it! Dave __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

05-22-2020, 09:31 AM	#14
MDPotter Senior Member Join Date: Aug 2018 Location: Western Colorado Posts: 1,165	Re: considering a 6.2 in my 68? You made the right choice! __________________ 1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax

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