I've been looking around the net, but can't find a dimension I am looking for. I plan to do some upgrades this winter on my 68 Firebird and would like to plan them out on paper first. Can someone provide me the effective length of the stock spindle assy? I believe this should be from upper ball joint pivot to lower ball joint pivot.

I just want to do some quick geometry to understand how much impact moving the upper mounts rearward will impact my available caster, but also to understand what sort of impact moving the tower in or out will have on my available camber.

I believe I am a victim of the saggy crossmember as I am at about -0.5 deg Camber with no shims on the pass side front. I know offset shafts, or a trip to the frame shop will correct this, but if I am going to cut off the tower and weld it back on, I might as well just fix it then to save the money. That's the whole point of the Gulstrand Mod is it's free, right? Similar results could be had with taller upper ball joints or aftermarket control arms, but that all costs money that could be spent elsewhere on the car.

Obviously when I tear it all apart I could take the measurement, but if someone already has it, or has parts handy they could measure, it would give me a head start in the planning stages. I may also add known shim and measure the camber delta to derive the effective spindle length, but once again, if someone has it, I can start running numbers on paper to get me through meetings at work So, long post short, if anyone has that dimension, please share it. Thank you.