Chad held the UPR double antiroll bar in place while Rob Lewis welded the mounts into plac
Of course, this driver is also concerned about getting the power to the ground, so I contacted Jeremy Martorella at UPR Products, who promptly shipped out its Extreme Duty Pro-Series rear suspension package. The system includes double-adjustable upper control arms and single-adjustable lower control arms just like the standard Pro-Series kit, but the Extreme Duty system incorporates larger spherical bearings and fasteners that will stand up to extreme power levels. With its double antiroll bar, the suspension is 7-second capable on the dragstrip. Our particular kit was shipped with offset lower control arms that offer extra tire clearance. Additionally, our lowers do not include spring perches because we chose to run coilover shocks.
While wrapping up our research and parts ordering, it was actually quite an honor to speak with Chris Alston about our Fox project. The man is a wealth of suspension knowledge and he knew just what we needed.
Rob must have spent half an hour taking measurements before finally welding the lower tabs
We covered all of the particulars of our Fox build and he selected his double-adjustable coilover conversion kit. It includes Chris Alston's Chassisworks double-adjustable VariShocks with separate knobs for rebound and compression dampening. The knobs have an adjustment range of 16 clicks. The billet-aluminum shock bodies are threaded for coilover spring collars, and the shocks feature spherical bearing mounts at each end to minimize the suspension bind caused by bushing deflection.
Chris threw in some adjustable lower shock mounts to work with our Strange Engineering housing and an extra pair of springs so we can do some thorough suspension tuning. We will examine the suspension tuning in more detail when we install the front suspension and dial it all in.
With parts collection complete, we loaded up and headed north for another trip to Rigid Race Cars outside Cincinnati, Ohio. Rob Lewis is the owner/fabricator at Rigid Race Cars and he has my trust to work on this car. To say that your author is a bit picky with this car is a bit of an understatement, but Rob does awesome work at a reasonable price, so we're proud to have him on our team.
Speaking of pride, all of the components installed in this Phase 3 article were manufactured right here in the USA-something we can all be proud of! Follow the captions as we show how our Fox rearend was upgraded for strip duty!
Once the welding was completed, we were technically finished installing the rearend and su
Here is a front view of the Strange 9-inch rearend with the aluminum Ultra Case, billet al
Although all of these components truly are stock-suspension replacements that bolt right i
The rearend upgrade is complete, but our '89 Mustang will not be leaving Rigid Race Cars.
We are not building a racecar out of our little stocker. But when we try to make a few pas