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#1 |
Account Suspended
Join Date: Dec 2006
Location: Calgary Alberta
Posts: 1
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new guy with some questions
Hi guys,
I'm new to the old GMC scene(I've got a Ford and a Dodge) and I've got a few questions. I just purchased a 71 GMC 5500 flatbed for my business. It has the 478 V6 with a 5 speed in it but has some nasty knocking going on in the engine. I have a line on another engine and was considering doing the swap, or else rebuilding the one I have. I like the idea of having the original size engine in the truck but I'm also not completely against putting in something different. It will be used on a daily basis and the bottom line is that it needs to be relaible. My other option is going with a big block v8 which are a dime a dozen. If I go that route, is there any way to mate the v8 to the existing 5 speed or will I have to go with another tranny as well. If I replace the V6 or have it rebuilt, what kind of life expectancy should it see. Also what is the availablility of parts to do the rebuild. Most of the driving is around town hauling a bobcat and equipment but it will also see highway duty from time to time, especially next winter. I've heard that these engines really don't like revving too much so I am considering swapping out the rear for something a little more highway friendly. What are your thoughts on this? Keep in mind that the most important thing to me is reliability, not originality. It is a work truck and will never see a car show or anything like that. thanks. |
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#2 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,477
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Re: new guy with some questions
-
![]() I can't answer your question but this will get your post back to the top. Someone here should be able to answer it for you. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Senior Member
Join Date: Sep 2004
Location: CANADA
Posts: 1,681
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Re: new guy with some questions
i have never delt with the v-6 in these trucks and have never seen on there in alberta
welcome aboard and i am sure someone can help out |
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#4 | |
Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Re: new guy with some questions
Quote:
![]() ![]() BBC aren't usually that easy to find - the racers like to snatch them up and they aren't ususally that cheap when you find them. That being said I think a BBC conversion would be cheaper than trying to rebuild/find parts for the V6 but I'm not 100% sure. you'll want lots of low end torque - and probably not want something that is "high reving" some of those bigger trucks had 292 6cly's and Small Blocks in them as well. How about doing a diesel swap??? ![]()
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered ![]() ![]() ![]() |
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#5 |
In Memoriam...
Join Date: Nov 2006
Location: Wallburg, NC
Posts: 1,216
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Re: new guy with some questions
Ooohhhh...opinion time...I got one of those...
I'd say go HT502, torque for days, and not TOO pricey. I'm no expert but I'd quess it'd bolt right up to the tranny. You'd be good to go.
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'68 C10 SWB 307ci 2BBL FarmTruk Pics Here "You know, doing what is right is easy. The problem is knowing what is right." |
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#6 |
Active Member
Join Date: Jan 2006
Location: Lower Mid-East Ca.
Posts: 326
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Re: new guy with some questions
You might try this site, they are the V6 people.
http://www.6066gmcguy.org/
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Never try to teach a pig to sing; it wastes your time and annoys the pig! ![]() ![]() My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4". |
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#7 |
Registered User
Join Date: Feb 2005
Location: Calgary Alberta
Posts: 2
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Re: new guy with some questions
I think I will head over to that site and see what i can come up with there as well. I guess I'll have to pull the engine and see what is involved before making a decision. At least with a big block it would be a bit easier to get parts in a reasonable time frame. As long as I can get it to bolt in there without too much of a headache, I'd be all for it. I'd be all over a diesel too but they're not always easy to find. Seems the big blocks are easier, around here anyway. maybe not quite a dime a dozen so don't get your hopes too high there Arkracing.
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#8 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: new guy with some questions
Welcome to the board. Twice, I think.
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__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#9 |
Catchy title goes here..
![]() Join Date: Mar 2002
Location: Rockwell, NC
Posts: 39,742
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Re: new guy with some questions
erm dual accounts are against site rules, please use the contact us form to reinstate your account..
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#10 |
Registered User
Join Date: Feb 2005
Location: Calgary Alberta
Posts: 2
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Re: new guy with some questions
My bad on that one.
![]() I did however get quite a bit of info from that other site, which was a nice help. Things may not be as bad as they seemed after all, so hopefullly we'll be up and running in a coplue months. Now if someone should stumble across an Allison auto tranny that would work for me, by all means let me know.:happy: Thanks, Mike |
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