When using modern radial tires on old ’50/’60/’70’s Mopars, front wheel alignment need to be adjusted for more and better steering response and overal safer handling of the car.
The following chart shows alignment spec. numbers for various driving styles which can/should be provided to the alignment shop.
|Sunday Cruising||-0.25°||+1.5°||1/16" to 1/8"|
|Daily Driver / Street||-0.5°||+2.5°||1/16" to 1/8"|
|High Performance / Street||-0.75° to -1°||+2.5 to +3.5°||1/16" to 1/8"|
|Autocross / Circuit track racing||-2.0° to -3.0°||+3.0 to +4.0°||0" to 1/16" **|
|Dragracing||0°||+1.5 to 2.0°||0 to 1/16" *|
These alignment specs are for all Mopar A, B, E or R-body cars. All years. “Angled torsionbar” (F, J and M-body) cars need much more caster, upto 5.0°.
Moog’s upper control arm offset bushings (Moog K-7103, 2 sets needed) can help provide extra Caster for more better and stable steering. However they need to be installed so, that, after installation, the upper ball joints are positioned further to the rear of the car.
* For dragracing minimum rolling resistance is the goal. Align the front end with the car in the halfway ‘nose high’ launch position, as it would go down the dragstrip.
** Some circuitracers and autocrossers prefer some toe-out, this is to help during cornering.
! Always set your car’s ride height before having it aligned !
Make sure to check all steering and suspension components. Worn bushings or balljoints will make an alignment job useless. Your alingment shop should check/point this out.
Also always make sure all tires are aired up to specs.