12 Bolt, 9", or S60

[mean78malibu]

They all cost about the same in the end, but what should I go with? I know the 12 bolt takes less power, and a 9" could mess up the geometry. Do any of the 9" options not mess up the upper control arm angle? Whatever I go with, I'm just going to get it complete from Mark Williams through S&W RaceCars so I don't have to deal with shipping to my house.

Running ~11.00 right now with 1.50 60' on trans brake. Building a turbo LQ4 for 2016 and just broke the 8.5 10 bolt in July...

Thanks in advance for all input!

 

[t5montecarlo]

What broke on the 8.5?

Is it for sale? I live about 30 miles NW of Philly.

 

[prairiehotrodder]

The 9" usually raises the upper control arm mounts which is a good thing. I'd go with it because it gives you the most options.
Brian

 

[grizwald]

I'm also curious to know what broke in the 8.5", and what parts you had in it.

 

[mean78malibu]

I have Moser 30 spline axles with c-clip eliminators, and eaton brute force posi with a broken spider (you can get these from them), cadillac disc brake swap, 4.56, 4.11, and 5.13 gears, an aluminum girdle back cover, and a billet steel 1350 pinion yoke. The housing passenger side axle tube is bent forward enough that the axle won't go back in.

I also have a SPOHN anti-roll bar but I might re-use this with the new setup if it fits.

 

[mean78malibu]

I just called TRZ and they said their 9" housing is a bit overkill, but the multiple control arm locations let me keep the same geometry as I have now.

I'm not sure what the case is with the s60 and 12 bolt but I assume a 12 bolt raises the upper control arms also since the housing is larger.

 

[LS6 Tommy]

You also need conversion upper arms for a 12 bolt beacuse the bushing ears are on a different angle than on a 7.5/8.5".

Tommy