Mustang 1964 - 66 Plus 3 A-Arms for Street and Handling # MNR-463 (Sold as a Pair)

Over the years since 1980 Global West has engineered many tubular control arms for Mustangs. The best upper control arm for 1964, 1965, and 1966 Mustangs is the current Negative Roll Plus 3 arm. The arm (Plus 3) provides additional positive caster (built into the arm) by moving the upper ball joint back towards the rear of the car. This is done for two important reasons. The first is Mustangs come alive when caster is injected into the front end. Corner entry is dramatically improved as well as straight line stability. Second: Caster is set be shimming the upper arm during alignment, it is difficult to get the caster and camber both correct at the same time because one affects the other. By having the caster built into the arm, alignment is achievable along with camber. A win win situation.

Global West Plus 3 Negative Roll upper arms requires relocating the upper control arm in the shock tower. The concept is similar to the Shelby mode used back in the 60's. Global West holes to be drilled (template provided) are not in the location as Shelby. However if you have already drilled your towers for the Shelby mod, you can use them.

Front spring will need to be shorter then stock. Performance lowering spring like Global West's S-23 or S-24 are best to use with this kit. You can us over springs provided the free length is about 11.5 inches. The system will give you about 1 1/4 drop.

The new Plus 3 Mustang arms are shipped assembled with billet cross shafts, Del-a-lum bushings and ball joints. The a-arms are black powder coated and the cross shafts are blue zinc (silver). Global West manufactures this product in its own facility here in San Bernardino CA.

Video Tutorial: 1964, 1965, 1966 Mustang Plus 3 Front Suspension Handling Kit



Prior to the Global West Plus 3 control arm, caster was increased by one of two ways:

1. By shimming either by installing or removing shims between the shock tower and the upper control arm shaft: Shims on the front bolt in the upper control arm add caster and camber. Shims removed from the upper control arm rear bolt, also increases caster and reduces camber. In many cases, it is hard to get enough caster and still have adequate camber.



2. Using the strut rod to get caster: Unfortunately, the strut rod on 1964-66 Mustangs is non-adjustable. Global West does offer adjustable strut rods (part #ASR-4) that allow caster to be adjusted simply by turning the hex adjuster. The hex adjuster will shorten or lengthen the rod thereby setting caster.

Tech Tip: Strut Rods

Strut rods are a great choice for getting caster; however, the suspension is still somewhat limited.

Here is why: As the strut rod is shortened, which increases caster, the tire is pulled forward closing the distance between the tire and the fender. Depending on the tire’s size, the tire could hit the front fender when the wheel is turned. The optimum choice is to use the Plus 3 upper control arm with the adjustable strut rod. This way, you get optimum caster and no tire rubbing issues with the front lower fender lip.

Note: When using Plus 3 arms, there is now a right and left upper control arm. The original control arms (factory or first generation Global West Negative Roll control arms) are universal.

Watch the product overview video above for more information.