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- - Difference between K20 and K30? (https://67-72chevytrucks.com/vboard/showthread.php?t=510399)

Number21

02-22-2012 01:05 AM

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?

80SPORT

02-22-2012 01:11 AM

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

andrewmp6

02-22-2012 02:47 AM

Re: Difference between K20 and K30?

I believe the k30 could be 14 bolt or dana 60 in the rear of it.

GM72K10

02-22-2012 07:08 AM

Re: Difference between K20 and K30?

Quote:

Originally Posted by andrewmp6 (Post 5204730)

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.

special-K

02-22-2012 08:53 AM

Re: Difference between K20 and K30?

K/30s came with clearance lamps on cab and tailgate.

Eyegore

02-22-2012 05:57 PM

Re: Difference between K20 and K30?

Cheng

02-22-2012 07:20 PM

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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