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Are all K frames the same?

Started by ron72charger, May 30, 2007, 07:36:26 AM

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ron72charger

May 30, 2007, 07:36:26 AM
I might need to replace the K frame on my 72 charger, I was wondering if all year K frames would fit. Also does it matter small block or big block. I have a 440. Any idea of what one would go for(ballpark guess)? My K frame may be bent, and I want to do it right the first time.
Thanks,
Ron

daytonalo

#1
May 30, 2007, 08:18:13 AM
Very much has been speculated about this subject , and only a very few know the truth . My daytona started out as a 70 charger , during resto and conversion I removed a fully loaded k-frame with disc brakes from a 72 b body , basically just for disc brakes , couldn't pass it up for 75 dollars . Well I asked the same question you did and received many answers . I have them side by side and the the steering box angle is different from the 70 -71-72 , probably due to cowl change . Will the fit , will the angle of box be OK and will the steering shaft coupler make it up ? My personal opinion NO , therefore going back with 70 K-frame and the discs from 72 , hope this helps . Larry O

FJMG

#2
May 30, 2007, 08:45:02 AM
Was there other compatibility issues or just angle? If it was just angle could a tapered steel wedge between box and K-member be easily fabricated to correct angle? I'm just thinking out loud here since I remember that my sevice manual for 97 ram suggests this between leaf and axle tube to correct d-shaft/pinion angle.

Charger74

#3
May 30, 2007, 08:45:07 AM
From what I do know, you might be ok if you use 71 -72 k members, but nothing after that.  73 and up is completely different.

daytonalo

#4
May 30, 2007, 09:56:51 AM
As previously mentioned , they angle is different , you could do a number of things . Top of my list would be to install proper year . Anyone who tells you they are the same , don't listen ,I have them side by side and they are not the same in the steering box mounting area .

Nacho-RT74

#5
May 31, 2007, 12:57:32 AM
Quote from: Charger74 on May 30, 2007, 08:45:07 AM
From what I do know, you might be ok if you use 71 -72 k members, but nothing after that.  73 and up is completely different.

That is a DEFINITELLY TRUE... rest I don't know
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

ron72charger

#6
May 31, 2007, 07:53:20 PM
So it seems that the 71 and 72 K frame are the same. Would anybody have a part number?. Does it matter if it is for a big block or small block? Is it just different mounts?
Thanks,
Ron

Charger1973

#7
May 31, 2007, 07:55:21 PM
71/72 use the same k frame in SB and BB cars
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