12 bolt need help with I.D.

stock eliminator · 12-07-2009, 10:27 PM

the tube is stamped KDC 251.. What's it out of?????
I have pic also

Dragsinger · 12-07-2009, 10:33 PM

since it is out of a Chevelle that narrows the choices. Those were used from 1964 - 1972

The 1964 - 1967 were more narrow than the 1968 - 1972. So if someone knows the width of either the early or later, we will have the answer.

stock eliminator · 12-07-2009, 10:34 PM

how do you know its out of chevelle?

Alan Roehrich · 12-07-2009, 10:54 PM

It is either out of a Chevelle/Monte Carlo of some vintage, or out of a big car (Impala, Caprice, wagon) because it is set up for a four link and coil springs.

FED 387 · 12-07-2009, 11:32 PM

Housing widths --------backing plate to backing plate
64-67 Chevelle ---61 inches
68-72 Chevelle/Monte Carlo----62 inches
65-70 Big Car----62.4 inches

Comp 387

FED 387 · 12-07-2009, 11:49 PM

upon further review it is probably out of a early model year 1972 el camino/monte carlo/chevelle
KD ---is the gear ratio 2:73
C------is the assembly plant--- Buffalo
251---is the assembly day of the year---September 8, 1971

Comp 387

Tom keedle · 12-08-2009, 05:27 AM

Quote:

Originally Posted by FED 387

Housing widths --------backing plate to backing plate
64-67 Chevelle ---61 inches
68-72 Chevelle/Monte Carlo----62 inches
65-70 Big Car----62.4 inches

Comp 387

that looks more like the wheel mounting surface (flange to flange) measurements

try not to end up with a truck 12 bolt...

stock eliminator · 12-10-2009, 09:11 PM

I measured the housing flanges outside to outside and it measures 55 1/4 "

FED 387 · 12-10-2009, 09:26 PM

My source tells me

64-67 is 56 1/2 flange to flange and 60 1/2 outside of brake drum to outside of brake drum
68-72 measurements are/is 58 1/2 and 62 1/2
68 was the transitional year so some early 68 vehicles might have leftover 67 housings

anyway kdc info is still correct--Comp 387

stock eliminator · 12-12-2009, 08:31 AM

i measured the welded on flanges that the brake plate bolts too that are on the axle tubes.
i guarantee it's NOT a truck rear.

12-07-2009, 10:27 PM	#1
stock eliminator Junior Member Join Date: Apr 2008 Location: Kearney Nebraska Posts: 24 Likes: 0 Liked 0 Times in 0 Posts	12 bolt need help with I.D. the tube is stamped KDC 251.. What's it out of????? I have pic also Attached Thumbnails

12-07-2009, 10:33 PM	#2
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: 12 bolt need help with I.D. since it is out of a Chevelle that narrows the choices. Those were used from 1964 - 1972 The 1964 - 1967 were more narrow than the 1968 - 1972. So if someone knows the width of either the early or later, we will have the answer. __________________ Larry Woodfin 471W

12-07-2009, 10:34 PM	#3
stock eliminator Junior Member Join Date: Apr 2008 Location: Kearney Nebraska Posts: 24 Likes: 0 Liked 0 Times in 0 Posts	Re: 12 bolt need help with I.D. how do you know its out of chevelle?

12-07-2009, 10:54 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,573 Liked 1,837 Times in 417 Posts	Re: 12 bolt need help with I.D. It is either out of a Chevelle/Monte Carlo of some vintage, or out of a big car (Impala, Caprice, wagon) because it is set up for a four link and coil springs. __________________ Alan Roehrich 212A G/S

12-07-2009, 11:32 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 529 Liked 333 Times in 180 Posts	Re: 12 bolt need help with I.D. Housing widths --------backing plate to backing plate 64-67 Chevelle ---61 inches 68-72 Chevelle/Monte Carlo----62 inches 65-70 Big Car----62.4 inches Comp 387

12-07-2009, 11:49 PM	#6
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 529 Liked 333 Times in 180 Posts	Re: 12 bolt need help with I.D. upon further review it is probably out of a early model year 1972 el camino/monte carlo/chevelle KD ---is the gear ratio 2:73 C------is the assembly plant--- Buffalo 251---is the assembly day of the year---September 8, 1971 Comp 387

12-10-2009, 09:11 PM	#8
stock eliminator Junior Member Join Date: Apr 2008 Location: Kearney Nebraska Posts: 24 Likes: 0 Liked 0 Times in 0 Posts	Re: 12 bolt need help with I.D. I measured the housing flanges outside to outside and it measures 55 1/4 "

12-10-2009, 09:26 PM	#9
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 529 Liked 333 Times in 180 Posts	Re: 12 bolt need help with I.D. My source tells me 64-67 is 56 1/2 flange to flange and 60 1/2 outside of brake drum to outside of brake drum 68-72 measurements are/is 58 1/2 and 62 1/2 68 was the transitional year so some early 68 vehicles might have leftover 67 housings anyway kdc info is still correct--Comp 387

12-12-2009, 08:31 AM	#10
stock eliminator Junior Member Join Date: Apr 2008 Location: Kearney Nebraska Posts: 24 Likes: 0 Liked 0 Times in 0 Posts	Re: 12 bolt need help with I.D. i measured the welded on flanges that the brake plate bolts too that are on the axle tubes. i guarantee it's NOT a truck rear. Last edited by stock eliminator; 12-12-2009 at 08:34 AM.