Speedtech 70-81 Camaro Track Time Suspension - Manual (Page 5)

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5. You will need to modify the mounting holes for the upper control arms to
achieve better camber gain and lower the roll center. First remove the control
arm mounting studs. Next, use a die grinder and lengthen the holes downward
approximately
¾” as seen in the photo below.
** Note: The stainless cross shaft on the upper control arms should not make
contact with the angled part of the cross member where it meets the vertical
control arm mount. Because of differences in factory tolerances, to be sure to
have proper fitment grind a little less than 3/4” and test fit the control arms.
Continue grinding as necessary to lower the arm mount
up to ¾” without
contacting the cross member. Both slots should be the same length.
6. Continue the frame modifications according to the instructions for installing the
Chicane coilover brackets.
7. Clean and/or sandblast and then coat the frame with your favorite products or
powder coat to prevent rust from forming.
8. Install the coilovers, lower control arms, the steering arms on the spindles, the
spindles on the lower control arms, upper control arms and brakes according to
their individual instructions. To properly spread the lower control arm mount tabs,
create a simple tool as shown on page 6.