Factory Five Racing Mk3 Roadster, Assembly Manual

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10. Bolt on the perch using the ½” bolts provided.
Spring perch mount bolted on frame.
11.
Thread the cut rear springs onto the conical frame mounts all the way.
12. Insert the cut rubber spring mount between the spring and the steel seat. Make sure the end of it is
flush with the end of the spring mount.
13. Place the flat part of the rear end on a floor jack.
14. Raise the rear end so that the upper control arms are flat.
15. There are three sets of bolt holes that the upper control arms can attach to. As a guideline, if the
engine you are using has less than 300 hp use the top set of holes. If the engine has between 300 and
400 hp use the middle set of holes. If the engine has more than 400 hp use the lowest set of holes. Use
the highest set of holes possible that prevents the car from having axle hop.
ATTENTION: The best street and track handling is achieved using the highest set of holes. For the best
launch at the drag-strip use the lowest set of holes. Using the lower set of holes requires putting
the bolts in from the opposite direction. Once the rear cockpit wall aluminum is installed, these
bolts will not come out unless a hole is drilled in the aluminum.
16.
Bolt the upper control arms into the upper mount brackets on the frame. The bolts install from the
outside in. Leave the bolts hand tight.
17. Lower the rear end so the lower control arms can mount to the frame using the Mustang bolts.
Tighten the bolts by hand for now.