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Discussion Starter #1
Does anyone know what the taper is on the lower ball joint? I am planning on reaming out the lower to use 5/8 ball joints. I will also use 1" longer uppers with the tubular a-arms I am planning.

thanks,
 
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Discussion Starter #2
The taper is 2" per foot. It seems to be fairly standard. In looking for a reamer bit there usualy arent many choices.

What can you tell me about the arms you are planning? are you building them yourself?
 
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Discussion Starter #3
Hello Chris,

Do you happen to know if it is a Morse, Brown & Sharpe, Jacobs or other taper? It does not appear to be any of these. As they are much less than the 2” per 12” (.16667” per 1”) you describe. Taper info

As for the arms, I am still doing the planning, but the initial information is as follows:

- ream lower ball joint hole for 5/8” ball joint
- fabricate tubular arms of DOM 4130 chrom-molly tubing
- use 1” extended shaft ball joint in top arm to raise pivot point 1”
- lower upper a-arms mounting point ~1” (without requiring modification to the mounting point on the frame – I have a plan for doing this)
- use Delrin or Nylon bushings (I am about to buy a lathe to turn these bushings)
- I plan to build lower shock mount to be strong enough for coil over shocks if desired > I need to work this out some as a coil over shock could be mounted closer to the balljoint increasing spring efficiency (lighter spring) and reducing stress on upper and lower shock mounts > if I do this then I would have to build a different lower if standard springs were to be used > I currently have HALS on my car and hotchkis spring in a box, so I would have to sell my front shocks and new springs and buy new coil over shocks

I considered building these and selling them, but am concerned with product liability issues at this point and am still investigating.

thanks,
 
K

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Discussion Starter #4
Chris, Stephen:
I never found a reamer with the correct taper. I found one that was close and had a tool sharpening place modify it to the correct taper. It is in the basement somewhere.

Ken Hennessy
96 BBB SS, 96 BBB B4U
 
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Discussion Starter #5
I got mine from Chadwick Reamers 877-492-8249
85020 Taper 1.5"/ft. Range 7/16"-1". Spiral cut, 6 flute. 1/2" shank with hole and handle pin, 01 tool steel treated to Rockwell 60 hardness. $50.40.
85500 Taper 2"/foot. Range 3/8"-1-1/8". $70.88.
I have both and I'm happy with them. These are the best prices I was able to find.
Tim
 
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Discussion Starter #6
Hey Ken....
If it's just "in the basement somewhere"... would you be willing to sell it?
 
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Discussion Starter #7
It looks like Tim's source was over $20 cheaper than www.stockcarparts.com.

Tim,
What did you use the 1.5"/ft. for? Is that the upper taper?

Thanks for all the input guys.
 
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Discussion Starter #8
I found my reamer in the basement. I started with a K-D P/N 2044 tapered reamer. I think the place I had modified it to the correct taper was in Riverdale, IL. Indiana Tool and Machine? I Don't remember exactly because it was 20 years ago for a another GM spindle modification job. I think I'll keep it because I may want to upgrade balljoints in the future. I might consider loaning it to you, Chris.

Ken Hennessy
96 BBB SS, 96 BBB B4U
 
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