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Old 02-22-2012, 01:05 AM   #1
Number21
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Difference between K20 and K30?

I'm just curious here, what would be the difference between my '73 K20 and a K30? My K20 is a camper special with the big 14 bolt rear end. What else does a SRW one ton have that my truck doesn't?
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Old 02-22-2012, 01:11 AM   #2
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Re: Difference between K20 and K30?

Frame...springs(rear mount width different on 1 ton)....and the big one ....K20 has a dana 44 in front...K30 has dana 60
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Old 02-22-2012, 02:47 AM   #3
andrewmp6
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Re: Difference between K20 and K30?

I believe the k30 could be 14 bolt or dana 60 in the rear of it.
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Old 02-22-2012, 07:08 AM   #4
GM72K10
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Re: Difference between K20 and K30?

Quote:
Originally Posted by andrewmp6 View Post
I believe the k30 could be 14 bolt or dana 60 in the rear of it.
no dana 60s in rears of K30s, K30 duallys had 14FF or Dana 70s in rear, K30 not avail until 1977.
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Old 02-22-2012, 08:53 AM   #5
special-K
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Re: Difference between K20 and K30?

K/30s came with clearance lamps on cab and tailgate.
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Old 02-22-2012, 05:57 PM   #6
Eyegore
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Re: Difference between K20 and K30?

10
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Old 02-22-2012, 07:20 PM   #7
Cheng
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Re: Difference between K20 and K30?

Rear Brakes
K20 L/D 11.15x2.75"
K20 H/D 13x2.5"
K30 13x3.5"

Rear Springs
K20 L/D 2000lb/ea
K20 H/D 3000lb/ea
K30 3500lb/ea

Frames
K20 Light Duty Frame Section Modulus is 3.88
K20 Heavy Duty Frame Section Modulus is 4.53
K30 Frame Section Modulus is 6.14
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