Using C-Body spindles on an E-Body ( and A-Body LCA's & Viper calipers)

[brads70]

  I have a bunch of various Howe ball joint here from various creations. Quality pieces!  They are super smooth( no drag) , like a ball bearing.

[EB3-GranCoupe]

I was re-reading this thread from the beginning. 

Can you explain post #3 a little more: "The KPI on the e-body spindle I measured at 5 degrees, on the C-Body I measured it at 7.5 Degrees. To measure it I mounted the spindle pin in the lathe and then used a precision bevel protractor and measured the machined flat surface on the top of the spindle."  Where exactly did you machine? What does KPI stand for, and SAI?
Thanks Brad!
Matt

[brads70]

I was re-reading this thread from the beginning. 

Can you explain post #3 a little more: "The KPI on the e-body spindle I measured at 5 degrees, on the C-Body I measured it at 7.5 Degrees. To measure it I mounted the spindle pin in the lathe and then used a precision bevel protractor and measured the machined flat surface on the top of the spindle."  Where exactly did you machine? What does KPI stand for, and SAI?
Thanks Brad!
Matt

I didn't machine anything on the lathe I just used it to hold the spindles to measure the KPI ( King pin inclination)  same thing as SAI ( Steering axis inclination )  KPI I guess is an older term to describe the angle , a throw back to the days of straight axles and when they used king pins.  The only machine work required to bolt on a C-Body spindle to the E-Body lower ball joint is the mounting holes ( see the drawings I posted) Because the KPI is 2.5 degrees different stock upper arms may not work.( they may be to long to get the camber)  I used Hotchkis adjustable arms and had no problem  I did have to slightly machine off some threads on the arms so the heim joints would go in enough so I could get the camber I wanted. 
https://en.wikipedia.org/wiki/Scrub_radius

[EB3-GranCoupe]

Brad,
What lower ball joint/steering arm set up did you use?  How did it fit given the bolt spacing difference?  since i am going to work with the easier to find 74-78 C-body spindles, i thought it might help to know how to make them work with your set-up.
Thanks! 

[brads70]

Brad,
What lower ball joint/steering arm set up did you use?  How did it fit given the bolt spacing difference?  since i am going to work with the easier to find 74-78 C-body spindles, i thought it might help to know how to make them work with your set-up.
Thanks! 

I used the stock e-body LBJ/steering arm . The dimensions are posted in the drawings I made earlier in this thread. You can figure out with them how much you will need to slot/machine the holes in the spindle so the lower ball joint will fit.

[EB3-GranCoupe]

OK, that's what i was figuring. The 73 C-body Lower LBJ/steering arm's (K7003 & K7005)are not too common to find.  It looks like maybe 0.210 or so to play with between both holes, or split the difference at 0.105.

[EB3-GranCoupe]

I found this handy cross-reference chart:
http://www.turbinecar.com/misc/Mopar-MoogSuspension.htm

[brads70]

I thought the LBJ/steering arm was the same 70-74 Moog K781 and K783 ?

[EB3-GranCoupe]

Yes, E & B body LBJ/steering arms are K781/K783. 1973 C-body LBJ/steering arms are K7003/K7005, and are near impossible to find.  Just like the spindle!

[EB3-GranCoupe]

I took my spindle down to my parts supply house, but got there only 15 minutes before closing.  i had enough time to check the bearings for the rotors (i have to order those).  But ran out of time before i could have them pull the LBJ's for comparison.....Maybe i can get down there on Saturday, and compare what they have on hand.

[1 Wild R/T]

I have the QA1 DA on all 4 corners now. Haven't had much time to play with them yet. Also swapped in new 18" tires and rims
18x11 on all 4 corners 315/30/18 up front and 295/40/18 in the rear. 
 

Brad, I understand why you blew the fenders out but I think the way the T/A stripiest distorted looks odd, I wonder if Challenger Gary who makes lots of custom stripes could possibly do something for you that would make the stripes look more proportional....   Just a thought....

[brads70]

Brad, I understand why you blew the fenders out but I think the way the T/A stripiest distorted looks odd, I wonder if Challenger Gary who makes lots of custom stripes could possibly do something for you that would make the stripes look more proportional....   Just a thought....

Ya I agree is does, but there is no way around it as far as I can see. It all depends on what angle you view it from. If you were to make it "fatter" over the widest part then it would still look "off" depending on what angle you viewed it from. Maybe a R/T stripe would look better?

[waskier]

"1973 C-body LBJ/steering arms are K7003/K7005"

Does anybody have the part number for the 1973 Spindles?

[waskier]

Continuing this theme, has anybody seen 13" C-body rotors?

[waskier]

This is such an intriguing option.  How about raising the inboard tie rod end to minimize the outboard ends leverage arm and increase ground clearance?   How close to the torsion bar is too close?   Would the Borgeson Close Ratio box with stock arms would increase torsion bar clearance?    How much longer is your cylinder because of your "A" LCA and "C" spindle?   SO many questions...