I've done all my homework and searched all the main threads. I have Spohn subframe connectors, a UMI Wonderbar, 10 spoke SS wheels wrapped in NT555's with 2" ebay spacers. The tires are staggered 245's up front and 275's in the rear, wouldn't have been my choice but they're in pretty good shape and I got a deal on them already on the rims. I ordered Koni Yellows for all 4 corners and they should be in about 2 weeks from now.

Next up, I'm ordering:
Ground Control Weight Jacks
J&M upper strut mounts
rod/ rod adjustable PHB
And I plan on doing the weight jacks, strut mounts and Konis at once and then the PHB as the money comes in since it installs independent of everything else.

I plan on running the car around 2" lower than stock on the weight jacks. It's a V8 auto car with 34/23 bars and WS6 suspension. I primarily use it hard on twisty backroads with occasional autox. I was thinking around 800 front 175 rear for the spring rates, anyone have any better suggestions?

!!!! -> And my ball joints are going bad and I will do those first, before anything else.
I was planning on buying the Howe extended joints to correct my roll center when I drop it until I saw that they cause bump steer.

How bad is the bump steer with the Howe .75" extended studs and the weight jackers cranked down the remaining 1.25 inches compared to just running the Moog joints and compensating for the entire 2inches with the weight jackers? If I need to run these and a bump steer elimination kit, will they work with my SS wheels and with the stock 15x7 Pontiac wheels?

 

I have a similar setup, except I'm using cut moog springs up front and a .5" longer than stock ball joint. From the research I did, I got the impression a bump steer kit wouldn't clear my 17x9.5 rims up front.

 

Yeah that's what I figured. How low is the car and how noticable is the bump steer?

 

To be honest, I haven't driven the car yet with the new suspension. Hoping to have it all back together in a couple of weeks. There is a good post over on frrax about the extended ball joints and rim clearance here

http://www.frrax.com/rrforum/index.php?showtopic=14954

 

Okay thanks! So are the spring rates I'm going with good for that height? Would I want to run stiffer springs if I go with the stock ball joints to try and band aid the long roll couple the car would develop?

 

What? I don't see how the extended ball joints create bump steer. Bump steer is driven by the geometry of the steering outer tie rod and the spindle. That geometry is set by the ride height. With weight jacks you would probably run the same ride height regardless extended ball joints or not. All the extended ball joints are doing is changing the angle of the a-arm, not the geometry of the tie rod at ride height. If anything I would expect bump steer to be better with the extended ball joints since you are getting closer to restoring factory geometry.

I started that thread on the Howe ball joints and will be doing my own bump steer testing with and without the extended ball joints.

 

They will fit with the OEM wheels but probably not the SS wheels depending on backspace. With wider wheels the tie rod typically needs to sit inside the wheel. You would probably need 19's to fit a bump steer kit inside 9"+ wide wheels.