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02-24-2017, 03:36 PM
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#26 |
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Registered User
Join Date: Apr 2016
Location: Alamosa Colorado
Posts: 5
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Re: 1968 c10 gear ratio for highway
Thames Jocko and Clay
My truck is C10 looking at the vin# it started life with a six in it.
__________________
Never enough time to do it right, always time to do it twice. 
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02-24-2017, 03:47 PM
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#27 |
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Senior Member
 
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,975
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Re: 1968 c10 gear ratio for highway
Interesting - that would have come with a 3.73 standard or 3.07/4.11 optional, none of which would give you 3k rpm at 55 mph. So, someone must've made some changes along the way or your speedo is way off, or both perhaps. Is it a 6 or 8 cyl tach?
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02-24-2017, 04:17 PM
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#28 |
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Registered User
Join Date: Dec 2012
Location: Vancouver, Washington
Posts: 1,644
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Re: 1968 c10 gear ratio for highway
My 68 originally was a manual and 327. It has 3.07 ration which appears to be stock. has decent power for what I want to do...
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1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop |
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02-24-2017, 09:00 PM
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#29 |
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Registered User
Join Date: Apr 2016
Location: Alamosa Colorado
Posts: 5
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Re: 1968 c10 gear ratio for highway
Jocko it has a factory repop 8cyl tachometer. Th e more I get into the truck the more it seems he was trying to make a stop light racer out of it. The cam has a lumpy idle and low vacuum. Its going away for a R.V. cam also has a Victor dual plane manifold I will probably keep it. So all that being said I would tend to believe that it has had 411 raio put in.
__________________
Never enough time to do it right, always time to do it twice.
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02-24-2017, 10:04 PM
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#30 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,219
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Re: 1968 c10 gear ratio for highway
MPH indicated is about 10mph high. 700r4/3.73
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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02-24-2017, 10:11 PM
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#31 | |
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Registered User
Join Date: Dec 2011
Location: winnipeg
Posts: 1,107
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Re: 1968 c10 gear ratio for highway
Quote:
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02-24-2017, 10:36 PM
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#32 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,219
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Re: 1968 c10 gear ratio for highway
20" wheel, 295/40/20 tire.
-klb
__________________
67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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02-24-2017, 10:39 PM
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#33 |
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Registered User
Join Date: Apr 2016
Location: Alamosa Colorado
Posts: 5
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Re: 1968 c10 gear ratio for highway
That's a good looking dash panel ya got there. That speed and RPM are a lot more what I have in mind. Thanks for the input.
__________________
Never enough time to do it right, always time to do it twice.
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02-24-2017, 11:00 PM
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#34 | |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,219
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Re: 1968 c10 gear ratio for highway
Quote:
-klb
__________________
67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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