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03-01-2017, 04:44 PM
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#1 |
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Registered User
Join Date: Nov 2015
Location: essex
Posts: 9
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Need help from uk
Hi guys will blazer k10 shafts fit a 78 12 bolt truck axle any help would be much appreciated
Thanks simon |
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03-01-2017, 05:35 PM
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#2 | |
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Senior Member
 
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,045
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Re: Need help from uk
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Blazers were called K/5s, although they were 1/2 ton chassis. GMC didn't call the Jimmy a ''K/750'', it's a K/1500. But anyway the K/5 got the same rear as the K/10, so it's academic. What year is the Blazer? The 12-Bolt GM Corp rear end got about 1-7/8'' wider; not sure if that was with design-MY '69, '70 or '71. Also I don't know how long GM kept the 12-Bolt before going to the 10-Bolt rear, usually associated with the Squarebodies. Good chance they may fit, but I'll wait for more experts to weigh in.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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03-01-2017, 07:50 PM
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#3 | |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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Re: Need help from uk
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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03-02-2017, 12:11 AM
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#4 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Need help from uk
In mid year 1970 the width of the truck 12 bolt increased to 63.5" and stayed that width thru 1982 which was the last year for the truck 12 bolt. The width is the same whether it is under a C series or a K series. So to answer your question, as long as you are playing within those years, the 5 lug and 6 lug axles are interchangeable.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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03-02-2017, 03:01 AM
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#5 |
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Registered User
Join Date: Nov 2015
Location: essex
Posts: 9
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Re: Need help from uk
Hi guys thanks for information so just to get it straight the shafts are 72 and the axle is 78 the axle measures 63.5 ?
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03-03-2017, 12:21 AM
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#6 | |
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60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: Need help from uk
The late '70-'87 C/K10 differentials measure 63.5" WMS to WMS (wheel mounting surface) That is the correct way to measure the width of a differential.
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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