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Old 02-21-2015, 09:26 PM   #1
jvs99560
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3/4 ton rear coils on 1972 c10?

I have a 72 c10 and plan on pulling a travel trailer as well as the occasional trailer load of firewood. Will i be able to remove my 1/2 ton coils and put in these AC DELCO # 45H2012 C20 coils? I'm wiling to replace a few parts if needed. Im not too concerned with ride quality which seems to be a downside with the heavier spring.
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Old 02-21-2015, 09:53 PM   #2
65standard
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Re: 3/4 ton rear coils on 1972 c10?

Yes, they will bolt right in. Same with the front too.
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Old 02-21-2015, 09:57 PM   #3
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Re: 3/4 ton rear coils on 1972 c10?

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Originally Posted by 65standard View Post
Yes, they will bolt right in. Same with the front too.
Thanks! Ill probably order them then. And thats great to know on the fronts. I wonder if there would be any benefit to running the heavier spring on the front? The truck has a small block so not too heavy.
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Old 02-21-2015, 11:18 PM   #4
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Re: 3/4 ton rear coils on 1972 c10?

Stock c20 springs are the same load rate as heavy duty c10 springs. I can't find ithe links right now but if you search around here there are a few threads where people list different springs you can use.

Also if you don't want a stiff ride, you may coincided using helper springs
http://67-72chevytrucks.com/vboard/s...d.php?t=555869
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Old 02-21-2015, 11:22 PM   #5
jvs99560
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Re: 3/4 ton rear coils on 1972 c10?

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Originally Posted by Acorn View Post
Stock c20 springs are the same load rate as heavy duty c10 springs. I can't find ithe links right now but if you search around here there are a few threads where people list different springs you can use.

Also if you don't want a stiff ride, you may coincided using helper springs
http://67-72chevytrucks.com/vboard/s...d.php?t=555869
Thank you for the info. I will ask my mechanic what he thinks will be best for me. Hes worked on the truck since new haha.
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Old 02-21-2015, 11:35 PM   #6
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Re: 3/4 ton rear coils on 1972 c10?

I put new 3/4t coils with Air Lift helper springs (bags inside coils) and that worked out really well. Used the truck as if it was a 3/4t for daily work
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Old 02-21-2015, 11:37 PM   #7
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Re: 3/4 ton rear coils on 1972 c10?

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Originally Posted by special-K View Post
I put new 3/4t coils with Air Lift helper springs (bags inside coils) and that worked out really well. Used the truck as if it was a 3/4t for daily work
Was it expensive or require special fabrication to get that setup?
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