2wd to 4wd conversion - 68 GMC Stepside - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68 GMC Stepside · 11-19-2010, 09:24 PM

I have a 68 GMC stepside 1/2 ton, 2wd, 250, 4 speed manual. Have been researching swapping out the front end to upgrade to disc brakes. Have also considered upgrading suspension to 3/4 ton. Am now thinking why not swap out front end, suspension, diff, transfer case etc and wind up with disc brakes, 3/4 ton suspension and 4wd. Does anyone know if it is as simple as finding a donor 3/4 ton 4wd and swapping everything? If that will work, what components need to be swapped and what year of trucks will be compatable? I'm assuming a new rear driveshaft would be in order due to length as well. Thanks in advance.

**Dieselwrencher** · 11-19-2010, 09:35 PM

Well, it's almost that easy but a lot of work is envolved. You can use your frame or try to find a donor 67-72 4x4 frame. If you want to use your frame you can use a donor truck of any year pre 1988 if worst comes to worst. If you go this route you will need to source a 4x4 engine cross member and a trans cross member from a 67-72, or build your own. Here is my thread on my 2wd conversion if you want to see steps and some info. By the way, welcome to the board!
http://www.67-72chevytrucks.com/vboa...d.php?t=310493

68 GMC Stepside · 11-19-2010, 09:46 PM

That's awesome. Thanks.

11-19-2010, 09:24 PM	#1
68 GMC Stepside Registered User Join Date: Aug 2010 Location: Millarville, Alberta Posts: 5	2wd to 4wd conversion - 68 GMC Stepside I have a 68 GMC stepside 1/2 ton, 2wd, 250, 4 speed manual. Have been researching swapping out the front end to upgrade to disc brakes. Have also considered upgrading suspension to 3/4 ton. Am now thinking why not swap out front end, suspension, diff, transfer case etc and wind up with disc brakes, 3/4 ton suspension and 4wd. Does anyone know if it is as simple as finding a donor 3/4 ton 4wd and swapping everything? If that will work, what components need to be swapped and what year of trucks will be compatable? I'm assuming a new rear driveshaft would be in order due to length as well. Thanks in advance. Last edited by 68 GMC Stepside; 11-19-2010 at 09:27 PM.

11-19-2010, 09:35 PM	#2
Dieselwrencher 6>8 Plugless........ Join Date: Sep 2007 Location: Prairie City, Ia Posts: 17,135	Re: 2wd to 4wd conversion - 68 GMC Stepside Well, it's almost that easy but a lot of work is envolved. You can use your frame or try to find a donor 67-72 4x4 frame. If you want to use your frame you can use a donor truck of any year pre 1988 if worst comes to worst. If you go this route you will need to source a 4x4 engine cross member and a trans cross member from a 67-72, or build your own. Here is my thread on my 2wd conversion if you want to see steps and some info. By the way, welcome to the board! http://www.67-72chevytrucks.com/vboa...d.php?t=310493 __________________ Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project *Tired of spark plugs? Check this out.* Last edited by Dieselwrencher; 11-19-2010 at 09:35 PM.

11-19-2010, 09:46 PM	#3
68 GMC Stepside Registered User Join Date: Aug 2010 Location: Millarville, Alberta Posts: 5	Re: 2wd to 4wd conversion - 68 GMC Stepside That's awesome. Thanks.



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