|Finally, a Mail-Order Frame Notch kit
for 1960-1972 Chevy Pickups.
BY BRIAN McCORMICK
Anyone who is familiar with customizing a '67-72 GM truck
will confess that crafting a frame notch for additional rearend clearance
is one of the most difficult tasks you can undertake. Because of the unique
frame construction over the rearend, aftermarket manufacturers have shied
away from developing an actual notch kit for this particular truck. Unlike
the popular late-model trucks, which have a frame that is straight as it
crosses over the rearend, the '60-72 truck frame actually bends outward
considerably. This has held most kit manufacturers at bay because of the
extreme difficulty in designing a marketable notch that is worthy of mass
Consequently, anyone seeking to really lower a '60-72
Chevy truck has had to deal with the axle tubes banging against the frame,
or call upon the services of a custom fabrication shop to craft a one-off
notch. Enter the folks at Classic Performance Products, who manufacture
one of the largest lines of restoration and conversion products for classic
trucks. Since they produce an enormous line of suspension conversion and
upgrading kits for '67-72 trucks, it only makes sense they would be the
first to tackle the tough job of fabricating a frame notch that actually
bolts in. It comes with precise instructions that walk the installer through
the appropriate steps for cutting the frame, and describes how to line the
notch up using existing frame features.
The result is a kit that includes a welded frame notch
made of 114-inch steel plate, grade-eight mounting hardware, urethane bumpstops
and easy-to-follow instructions. Better yet, the process can be done without
having to remove the bed. Anyone with a '67-72 Chevy that has been lowered
at least four inches definitely needs a frame notch for additional axle
tube travel. Just installing the notch provides an additional three
inches of travel, which translates into a greatly improved ride. In addition
to the notch kit, Classic Performance Products has also engineered a new
adjustable track bar, also called a Panhard bar, to replace the stock non-adjustable
version. The reason for this is that when lowered, the stock Panhard bar
tends to bind up and pull the rear end to the driver's side as the springs
compress. With the new, thicker, adjustable track bar, the precise rear-end
location can be set and altered at the owner's discretion.
Here Is the C.P.P. '60-72 Chevy rear frame-notch section
that goes above the rearend. Made or 1/4-inch plate steel, this new section
is as strong as they come.
After consulting the instructions. the frame is cut out,
The C.P.P. frame notch is then pre-fit into the cut-out
area to check the fitment. If it fits right, mark the mounting holes with
a center punch.
Using a sharp 1/2-inch drill bit, drill out the new mounting
Classic Perlormance products provides grade-eight hardware
to mount the notch. As you can see, this new section fits great and is Incredibly
easy to install. You don't even have to remove the truck bed, even though
we did for better camera angles.
While we were at it, the C.P.P. staff decided to show
us their new adlustable track bar. After removing your old Panhard bar,
simply insert one of the ends into the rearend stud.
The end that attaches to the frame is the adjustable end.Turn
the end until you have the appropriate length, then install and tighten
the jamb nut.
With that, you now have a better rear suspension. The
thicker, adjustable Panhard bar will definitely come in handy, and can be
adjusted without having to raise the truck.
|Classic Performance Products 378 E Orangethorpe
Ave., Placentia CA 92870 Tech Line 714-522-2000|
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