DOES A 70 HAVE THE SAME K FRAME AS 71-72 ??????????

[daytonalo]

I always thought they were the same , they look the same , I have them side by side and they look the same . Heres the problem , I saw a swaybar kit on e-bay and they only listed 71-72 b body , one of my k-frames has a sway bar and I want to install a thicker sway bar , and a rear sway bar . Has anyone ever done this before ? The rear is not the issue . Larry O

[69fuchs]

I am not sure about the sway bar, but the difference in k frames is the steering box angle.  70 b body is different than 71-72 b body.  71-72 b body is the same angle as 70-74 E body.

My guess is that the location of the sway bar brackets on the lower control arms could be in different places from year to year.

[Nacho-RT74]

so with just the steering box angle,  is the rest the same ? I'm asking because  a friend of mine with a 71 got broken his K member so I was to ask about same stuff.

I guess if 70 is the same than 71/72 then also earliers like 68/69 and even more earliers ( saving the steering box difference of course )

[69fuchs]

so with just the steering box angle,  is the rest the same ? I'm asking because  a friend of mine with a 71 got broken his K member so I was to ask about same stuff.

I guess if 70 is the same than 71/72 then also earliers like 68/69 and even more earliers ( saving the steering box difference of course )

the box itself is not different, where the box mounts to the k frame is different.  70 and newer k's have the sway bar passing through the center of the k, while 69 and older do not have a provision for the sway bar to pass through.

The sway bar is mounted on the front of the K on 69 and older

The correct interchange is 70-74 E and 71-72 B body.  1970 B body K should not be used in a 71-72 b body or vice versa.  (It will fit, but the steering column/pitman arm angle will not be correct.)

[daytonalo]

OK , if that is correct and that is the only difference , and I am well aware of the sway bar diff from 69-70 . Then will a sway bar kit that they make for a 71-72 , fit on a 70?

[daytonalo]

Do you know there is a difference from a swap and it didn't work ?I say this because I have them side by side and I measured various points including an angle finder on the  S box pad and they look the same . Again I'm comparing a 70 to a 71-72

[Nacho-RT74]

steering box brackets can be changed if I have the right one already to change to an earlier K member, but now I wish to know about the same that daytonalo... what about sway bar.

[daytonalo]

As I mentioned , the steering box pad appears to have the same angle for years 70-72 , according to an angle finder

[Nacho-RT74]

I mean just in case

[daytonalo]

[69fuchs]

Do you know there is a difference from a swap and it didn't work ?I say this because I have them side by side and I measured various points including an angle finder on the  S box pad and they look the same . Again I'm comparing a 70 to a 71-72

I helped with building hemi k frames for mega parts.   Many hours of research went into finding differences in each K frame. 

The steering angle is different.  The easy way to tell the difference between a 70 b body k and a 70-74 E (or 71-72 B) is to look at the steering box mount.

The 70 b body K has a pronounced "dent" that your thumb will fit in on the face of the steering mount, while the E/late B will have a smooth curve with no dent.

You CAN interchange the two, but it will change steering angles.  All of the research was done in a tool and die shop. (the same place that builds the hemi frame brackets on a cnc machine)

The tool and die shop made jigs to fit the frame brackets, that is where we found out about the angle difference.

[daytonalo]

Thanks for the tip , you should be able to inform me the difference in degrees  between the two ? If not I will drag them up on a surface plate and get to the bottom of this .

[Nacho-RT74]

that's why I was saying JUST IN CASE they finally are different , but that wouldn't be a BIG problem if we have the donor to change.

But still what about the sway bar ?

[daytonalo]

I don't see why a 1- 1/8 sway-bar kit that is on ebay listed for a 71-72 wouldn't work ,  I have lower control arms for sway bar . What do you think ?

[69fuchs]

Thanks for the tip , you should be able to inform me the difference in degrees  between the two ? If not I will drag them up on a surface plate and get to the bottom of this .

sorry, I don't know the degree angle numbers.  Surface plate it is......

[GreenMachine]

I have a '70 that had a 318 originally and now a 440 from a '72 Imperial. I've met one of the previous owners of the car that put the engine in. What I got out of talking to him is that he used any parts he had laying around to make that car run. My steering column doesn't line up right ( the shaft rubs the upper side of the sleeve). I ended up using a Flaming Rivers U-Joint to help the problem. Also I bought TTI headers that are supposed to be a good fit, but I had to dent them for clearance of the idler arm and pitman arm. Sounds like I might have a 71-72 K frame. If so that would mean the angle would be slighly less. I'll have to check into that further.