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10-14-2009, 05:12 PM | #1 |
Registered User
Join Date: Mar 2009
Location: Covington Georgia
Posts: 87
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Original specs from 1970????
I am wondering if there is somewhere to go and find out the original specs of a 70 C20?
Like horse power,torque,etc? Mine came with a 350 but was replaced some time ago with what I thought was a 350 but have not run the block numbers yet. I bought what I thought was a good running rebuilt 350 to replace this one which is wore out,smoking,burning oil. I ran the numbers only to find I bought a 307. I am in the process of getting my money back.He said he would refund it but we all know how that goes. Other question is if I get stuck with this 307 which has had valve work and high compression pistons,how much of a drop off is this from an original 350? I removed the intake,heads,cam and verified it LOOKS new/rebuilt. Thanks for any help anyone can give. AJ Last edited by ajcan; 10-14-2009 at 05:25 PM. |
10-14-2009, 06:31 PM | #2 |
member #16
Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: Original specs from 1970????
The HP on a 1970 350 c.i. 4bbl is 255. Cant help on torque.
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 10-14-2009 at 06:32 PM. |
10-14-2009, 06:35 PM | #3 |
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Join Date: Aug 2007
Location: Sachse, Texas
Posts: 614
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Re: Original specs from 1970????
Not sure if this helps you or not but I have some specs from my Chilton that bases the power/torque on of course displacement.... and carb size..... nothing specific about C10 or C20
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10-14-2009, 06:38 PM | #4 |
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Join Date: Jan 2009
Location: enumclaw wa
Posts: 58
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Re: Original specs from 1970????
the factory brochure from 70 rates the 307 at 200 hp and the 350 at 255hp.
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10-14-2009, 06:59 PM | #5 |
Registered User
Join Date: Mar 2009
Location: Covington Georgia
Posts: 87
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Re: Original specs from 1970????
Thanks for the answers.
255 versus 200 is quite a bit of difference. Not sure what mine us putting out now but nowhere near 255 I'm sure. So over what I have now I might not notice but I will know. Let's hope I get my money back. AJ |
10-14-2009, 08:53 PM | #6 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Original specs from 1970????
factory service manuals available cheaply from most all vendors have loads of specs and on top of that they tell you the proper way to fix stuff
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