Metric Upper A arm recommendations

[3dinter]

We are finally allowed to run an "IMCA type" upper arm for 2012. Everything else on the front suspension has to be STOCK, 6-7/8 centers, etc, etc, all STOCK. What would a good recommendation be for a metric car running a 3/8 & 1/4 mile Semi banked track.

I would assume a shorter arm on the right and a longer on the left ?
Aluminum vs Steel center arm mount ?
What does the offset arms do ?
I would prefer to not ream out the upper part of the metric spindle if I don't have to.
I see a lot of arms are 6" on center, could you SHADETREE the upper mounting hole or holes and use a 6" arm if it is better ?
If you recommend a part plz include a website, company or part #, if you know it
As stated my car is 100% stock on the front end so plz keep that in mind when recommending.
Thanks for your help.

[3dinter]

Why not just use the IMCA type like your rules want you to use? They bolt on oem and use oem ball joint.

You know us racers always want the advantage....and stock parts are not usually an advantage.

[tornadochaser7]

We build our own, uses stock cross shaft bolt pattern and we make them with the larger or the smaller stock size ball joints. Geometries are different than stock or the ones in the catelog even. Left side is 10" from center of shaft to center of ball joint. We also use heavier wall tubing than most so they don't bend as easy. Sell them for $60 each.
If interested email or text me and I can send you pics of them.
Thanks
Chris
320-815-1688
tornado@runestone.net

[Driver88]

Thats why they won't let us run them. Too easy to cheat.

[steveshawjr]

we make our own uppers now fairly easy to do

[cheaterleaddog]

imca uppers are different links they build a light one and a heavy one get the heavy one

[stock car driver]

IMCA are right and left. right is 1\4 shorter than stock left is that much longer.

I run steel shaft, been going to try alum but havent, they all bend.