Front end differences 78 vs 72 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**ScottH** · 03-16-2003, 09:33 AM

Can anyone tell me the differences between the front suspension from a 78 vs a 72 truck (aframes, rotors, etc.)? Also are the steering boxes interchangeable?

Any info is appreciated. Thanks

**ScottH** · 03-16-2003, 11:01 PM

Anyone?

pugs · 03-17-2003, 01:17 AM

72 is abit different but my brother had a 72 and we replaced the calipers for a 73 and had no problems

gchemist · 03-17-2003, 02:52 AM

The disc brake versions of the '72s should almost be identical. Ask the 67-72 guys. Those guys call tell you for sure. Most of the older 67-71s can be converter to disc brakes from 72 or 73-87 model trucks.

73stepside · 03-17-2003, 11:17 PM

73-87s have different tie rod ends and ball joints. other than that, if the discs are 1.25 than they will work on 71-72 the calipers should be the same for 1.25 discs too. you can make a 73-87 crossmember work on 67-72 and only have to drill 2 holes. track width is the same i believe.

03-16-2003, 09:33 AM	#1
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Front end differences 78 vs 72 Can anyone tell me the differences between the front suspension from a 78 vs a 72 truck (aframes, rotors, etc.)? Also are the steering boxes interchangeable? Any info is appreciated. Thanks

03-17-2003, 01:17 AM	#3
pugs Registered User Join Date: Mar 2003 Location: Hamburg Pa Posts: 1,153	72 is abit different but my brother had a 72 and we replaced the calipers for a 73 and had no problems __________________ I don't do thing cuz I can, I do it cuz someone told me it couldn't be done...

03-17-2003, 02:52 AM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	The disc brake versions of the '72s should almost be identical. Ask the 67-72 guys. Those guys call tell you for sure. Most of the older 67-71s can be converter to disc brakes from 72 or 73-87 model trucks. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-17-2003, 11:17 PM	#5
73stepside Registered User Join Date: Feb 2002 Location: Moore OK 73160 Posts: 974	73-87s have different tie rod ends and ball joints. other than that, if the discs are 1.25 than they will work on 71-72 the calipers should be the same for 1.25 discs too. you can make a 73-87 crossmember work on 67-72 and only have to drill 2 holes. track width is the same i believe. __________________ 04 GMC Sierra RCSS 70 CST LWB 04 HD Sportster 1200 Custom

03-16-2003, 11:01 PM	#2
ScottH Senior Member Join Date: Sep 2002 Location: Hampstead, NC Posts: 8,190	Anyone?



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