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02-24-2017, 03:36 PM | #26 |
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Join Date: Apr 2016
Location: Alamosa Colorado
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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.
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Never enough time to do it right, always time to do it twice. |
02-24-2017, 03:47 PM | #27 |
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Location: Godley, TX
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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 | #28 |
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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 |
02-24-2017, 09:00 PM | #29 |
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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.
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02-24-2017, 10:04 PM | #30 |
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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 |
02-24-2017, 10:11 PM | #31 |
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Re: 1968 c10 gear ratio for highway
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02-24-2017, 10:36 PM | #32 |
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Location: Dallas Texas
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Re: 1968 c10 gear ratio for highway
20" wheel, 295/40/20 tire.
-klb
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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 |
02-24-2017, 10:39 PM | #33 |
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Location: Alamosa Colorado
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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.
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Never enough time to do it right, always time to do it twice. |
02-24-2017, 11:00 PM | #34 |
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Re: 1968 c10 gear ratio for highway
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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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