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Old 09-14-2020, 02:04 PM   #1
Bueno 68C-10
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K30 Axle Transplant or Frame Swap

Hey guys,
I am looking at swapping my 67 c30 over to 4x4. I am curious does anyone have experience with this? Is it better to transplant a dana 60 under my c30 frame or is it better to Get a 73-87 K30 frame and do a body swap?

Thanks in advance!
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Old 09-14-2020, 02:15 PM   #2
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Re: K30 Axle Transplant or Frame Swap

Square body frame swap (in my opinion) would be more work than putting a front end under the existing frame. But I've been doing conversions for over 30 years. Is your 67 frame dented in at the steering box?
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Old 09-14-2020, 03:13 PM   #3
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

kwmech,
Thank you for the reply! I believe my frame is not dented for the box, but I would need to look again. If it is dented, I will have to patch this with flat steel correct?
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Old 09-14-2020, 03:26 PM   #4
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by Bueno 68C-10 View Post
kwmech,
Thank you for the reply! I believe my frame is not dented for the box, but I would need to look again. If it is dented, I will have to patch this with flat steel correct?
If it is dimpled for the steering box you won’t have to do anything but bolt up the later style powering steering box. I would swap the 60 under your existing frame. The square body frame can be made to work but it’s not plug and play by any means.
http://67-72chevytrucks.com/vboard/s...=703160&page=6
This thread might give you an idea about what it’ll take to get the front axle under it. There are others like it on here too.
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Last edited by 57taskforce; 09-14-2020 at 03:38 PM.
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Old 09-14-2020, 06:00 PM   #5
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Re: K30 Axle Transplant or Frame Swap

Are the k30 spring mounts different then say the k10

I have a chance to get a 70 c30 gmc and thinking of things to do with it
In the land of ice and snow a heavy 2 wheel drive is not as useful
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Old 09-14-2020, 06:54 PM   #6
57taskforce
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Re: K30 Axle Transplant or Frame Swap

67-72 4x4 and square body K30 use the same spring perch width front and rear. 1/2 and 3/4 square body rear perches are not the same as 67-72. Square body front axle perches are the same width as 67-72 4x4. Clear as mud??
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'57 3100 350/700r4 4” lift 35x12.5's
'72 K20 Cheyenne 350/SM465 557 paint http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB 305/sm465/205 4” lift 33x12.5’s awaiting vortec 350 swap and light restoration http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's
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Old 09-14-2020, 07:02 PM   #7
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Re: K30 Axle Transplant or Frame Swap

I converted my C30 frame to 4x4. Its pretty simple if you can locate the 4x4 brackets.
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1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks)
1972 Jimmy (soon to be Hickey cloned)
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1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank
1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT)
http://67-72chevytrucks.com/vboard/s...d.php?t=624819
1989 V3500 Crew Cab (454tbi, NV4500, np205)
1970 Chevelle SS (LS5 454,th400,8track,buckets,tach)
:2004 Jeep Wrangler Rubicon (daily driver)

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Old 09-14-2020, 08:27 PM   #8
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by 71blksuper4x4 View Post
I converted my C30 frame to 4x4. Its pretty simple if you can locate the 4x4 brackets.
Yep. Pretty darn easy. Almost plug and play. Definitely the way to go
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Old 09-15-2020, 02:03 AM   #9
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Re: K30 Axle Transplant or Frame Swap

Did you bolt the spring perchs on with 7/16 grade 8 bolts ?

I have a line on a c30 running truck been decideing on what could do to it
A 70 gmc 1 ton dually 4x4 would be a good project for it a spare sm465 with 205 tcase a spare 69 k10 chassis 8 bolt dana 44 and dana 60 rear i guesing the rear in the c30 is a dana 60
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Old 09-15-2020, 11:32 AM   #10
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by 71blksuper4x4 View Post
I converted my C30 frame to 4x4. Its pretty simple if you can locate the 4x4 brackets.
Where did you find the brackets?

Also do you have to drill the mount holes? If so does anyone have a template or measurements to follow?
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Old 09-15-2020, 05:59 PM   #11
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by Bueno 68C-10 View Post
Where did you find the brackets?

Also do you have to drill the mount holes? If so does anyone have a template or measurements to follow?
Most guys use the front spring hanger/core support brackets from a 4x4 truck. You will have to drill the holes.
A paid subscription and a want to buy add on the parts board will likely get you what you need.
Off road design and others have fabbed front hangers that can likely be made to work but won’t be as easy as the oe offering.
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'57 3100 350/700r4 4” lift 35x12.5's
'72 K20 Cheyenne 350/SM465 557 paint http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB 305/sm465/205 4” lift 33x12.5’s awaiting vortec 350 swap and light restoration http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's
‘10 Camaro 2SS/RS Aqua Blue Metallic

Last edited by 57taskforce; 09-15-2020 at 06:05 PM.
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Old 09-15-2020, 10:03 PM   #12
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by Bueno 68C-10 View Post
Where did you find the brackets?

Also do you have to drill the mount holes? If so does anyone have a template or measurements to follow?
I have collected parts over the years or 4x4s destined for scrap. I robbed 4x4 brackets from my parts stash and drilled and bolted them to accept the next size up grade 8 bolts. This truck was originally a 72 C30 chassis.
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TREVOR
1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks)
1972 Jimmy (soon to be Hickey cloned)
1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track)
1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank
1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT)
http://67-72chevytrucks.com/vboard/s...d.php?t=624819
1989 V3500 Crew Cab (454tbi, NV4500, np205)
1970 Chevelle SS (LS5 454,th400,8track,buckets,tach)
:2004 Jeep Wrangler Rubicon (daily driver)

WTB: 1968-70 Cruise Control Lever
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Old 09-16-2020, 06:55 AM   #13
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Re: K30 Axle Transplant or Frame Swap

You can use spring brackets from any GM 4wd frame, from Blazer up.
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'67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi..........'The 67' (project)
'72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok...'The 72' (rolling)
Tim

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R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586
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Old 09-16-2020, 08:18 AM   #14
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by 71blksuper4x4 View Post
I have collected parts over the years or 4x4s destined for scrap. I robbed 4x4 brackets from my parts stash and drilled and bolted them to accept the next size up grade 8 bolts. This truck was originally a 72 C30 chassis.
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Last edited by LockDoc; 09-17-2020 at 09:51 PM.
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Old 09-16-2020, 10:41 AM   #15
71blksuper4x4
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Re: K30 Axle Transplant or Frame Swap

I only have one spare set left, and I am contemplating using them on a longhorn frame I have to make a K30 Dually.
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TREVOR
1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks)
1972 Jimmy (soon to be Hickey cloned)
1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track)
1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank
1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT)
http://67-72chevytrucks.com/vboard/s...d.php?t=624819
1989 V3500 Crew Cab (454tbi, NV4500, np205)
1970 Chevelle SS (LS5 454,th400,8track,buckets,tach)
:2004 Jeep Wrangler Rubicon (daily driver)

WTB: 1968-70 Cruise Control Lever

Last edited by LockDoc; 09-17-2020 at 09:52 PM.
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Old 09-16-2020, 11:02 AM   #16
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by 71blksuper4x4 View Post
I only have one spare set left, and I am contemplating using them on a longhorn frame I have to make a K30 Dually.
No problem! Thank you for your input, How do you find where the back front axle mount should be located?
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Old 09-17-2020, 06:41 PM   #17
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

How do you find where the rear of the front leaf spring mount should be located?
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Old 09-17-2020, 09:19 PM   #18
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Re: K30 Axle Transplant or Frame Swap

I measured from the radiator support bracket to where it landed on one of my 4x4 frames. I may have also measured from the front cab mount as well. The 67-72 Chevy 4x4 brackets are made to sit on the inside of the frame rails, so really, you just need to locate the bushing hole.
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TREVOR
1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks)
1972 Jimmy (soon to be Hickey cloned)
1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track)
1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank
1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT)
http://67-72chevytrucks.com/vboard/s...d.php?t=624819
1989 V3500 Crew Cab (454tbi, NV4500, np205)
1970 Chevelle SS (LS5 454,th400,8track,buckets,tach)
:2004 Jeep Wrangler Rubicon (daily driver)

WTB: 1968-70 Cruise Control Lever
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Old 09-17-2020, 09:49 PM   #19
Bueno 68C-10
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Re: K30 Axle Transplant or Frame Swap

Quote:
Originally Posted by 71blksuper4x4 View Post
I measured from the radiator support bracket to where it landed on one of my 4x4 frames. I may have also measured from the front cab mount as well. The 67-72 Chevy 4x4 brackets are made to sit on the inside of the frame rails, so really, you just need to locate the bushing hole.
That’s simple enough. Thank you!
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