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EARLY FORD BRONCO
SUSPENSION SYSTEMS
Benefits of a James Duff Suspension System:
Why a complete
package is better...
 These systems
are the best available because they are designed so all
of the components work together to improve ride and handling
under varying conditions. Our suspensions keep in mind
the daily driver and full-time four-wheeler; Someone who
wants to ride comfortably and safely both on the street
and on the trail. We only offer lifts up to 3 1/2", due
to practical limits on driveline angles and vehicle roll
center. Designs are based on a Bronco Hardtop with a 302
engine. Less weight (from a 6 cylinder or no top) or more weight
(from engine swaps, winches, heavy bumpers, etc.) will
affect the amount of lift. Our budget oriented systems
use add-a-leafs for the rear end rather than blocks. Inspect
your leaf springs for sagging, cracks or daylight between
leafs before ordering. Add-a-leafs will not make up for
tired or cracked leafs. Upgrading to a new leaf spring
pack system may be necessary.
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SYSTEM B: Bronco 3.5" Suspension
3.5" Progressive
Rate Coils, 6.25° 14 piece Bushing Kit, Large
Add-a-leafs, Tracking Bar Drop Bracket, U-Bolts, 4 Shocks.
#5000B System B:66-75 Bronco, $459.00
#5001B System B:76-77 Bronco, $459.00
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Add Double Shocks to the Basic system for
Better Performance and Handling. |
SYSTEM D: Bronco 3.5" Deluxe Suspension
3.5" Progressive
Rate Coils, 6.25° 14 Piece Bushing Kit, Small Add-a-leafs,
U-bolts, Front & Rear Double Shock Mounts, 8 Shocks.
#5000D System D:66-75 Bronco, $709.00
#5001D System D:76-77 Bronco, $709.00
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Adds Original Front Dual Shock Hoops to the
Basic System for more Travel. |
SYSTEM F: Bronco 3.5" Hoop Suspension
3.5" Progressive Rate Coils, Hoop Mounts,
Rear Double Shock Mounts, 6.25° 14 Piece Bushing Kit,
Small Add-a-leafs, U-bolts, 8 Shocks.
#5000F System F:66-75 Bronco, $859.00
#5001F System F:76-77 Bronco, $859.00
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 The Ultimate Suspension
The Ultimate systems incorporate all the best features from our other suspensions and carry it one step further with the addition of ten or eleven leaf soft ride springs. Along with zinc plated Original Dual Shock Hoops and our progressive rate coils, these springs will provide excellent articulation without a body lift or major structural modifications. Articulation and comfort... the best of both worlds!
SYSTEM G: 3.5" Ultimate Suspension
3.5" Progressive Rate Coils, 6.25° 14 piece Bushing Kit, 11 Leaf Soft Ride Springs, Tracking Bar Drop Bracket, U-bolts, Original Dual Shock Hoops, Rear Double Shock Mounts, 8 Shocks, Urethane Shackle Bushings
#5000G - MD System G:66-75 Bronco, $1239.00
#5001G - MD System G:76-77 Bronco, $1239.00
#5000G- HDSystem G:66-75 Bronco, $1239.00
#5001G - HD System G:76-77 Bronco, $1239.00
SYSTEM K 5.5" Ultimate Suspension
5.5" Progressive Rate Coils, 7° 14 piece Bushing Kit, 11 Leaf Soft Ride Springs, Heavy Duty Tracking Bar Drop Bracket, Adjustable Radius Arm Drop Brackets, U-bolts, Original Shock Hoops, Rear Double Shock Mounts, 8 Shocks, Urethane Shackle Bushings.
#5000K-MD System K: 66-75 Bronco, Medium Duty Leafs, $1529.00
#5001K-MD System K: 76-77 Bronco, Medium Duty Leaf, $1529.00
#5000K-HD System K: 66-75 Bronco, Heavy Duty Leafs, $1529.00
#5001K-HD System K: 76-77 Bronco, Heavy Duty Leafs, $1529.00
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Long Travel Suspension System
The Long Travel systems are the Ultimate Suspensions with our Stage
2 Long Travel Shock Hoops, Stage 2 Rear Shock Mounts, and Long
Travel Shocks. These shock mounts are designed to be used with
at least a 2” body lift. The mounts allow you to take full
advantage of the travel our springs are capable of. These systems
will provide excellent articulation along with a comfortable ride
on and off-road. Better articulation and still comfortable...the
best of both worlds!
SYSTEM J: 3.5” Long Travel Suspension
3.5” Progressive Rate Coils, 6.25° 14 piece Bushing Kit,
11 Leaf Soft Ride Springs, Tracking Bar Drop Bracket, U-bolts,
Stage 2 Long Travel Shock Hoops, Stage 2 Rear Shock Mounts, 4-8120
Long Travel Shocks, 4-8114 Shocks, Urethane Shackle Bushings. *At least
a 2” body lift required.
#5000J - MD System J: 66-75 Bronco, 11 Leaf, $1399.00
#5001J - MD System J: 76-77 Bronco, 11 Leaf, $1399.00
#5000J - HDSystem J: 66-75 Bronco, 10 Leaf, $1399.00
#5001J - HD System J: 76-77 Bronco, 10 Leaf, $1399.00
SYSTEM L: 5.5" Stage 2 Suspension
5.5" Progressive Rate Coils, 7° 14 piece Bushing Kit, 11 Leaf Soft Ride Springs, Heavy Duty Tracking Bar Drop Bracket, U-bolts, Adjustable Radius Arm Drop Brackets Stage 2 Long Travel Shock Hoops, Stage 2 Rear Shock Mounts, 4-8120 Long Travel Shocks, 4-8114 Shocks, Urethane Shackle Bushings. *At least a 2” body lift required.
#5000L-MD System L: 66-75 Bronco, Medium Duty Leafs, $1795.00
#5001L-MD System L: 76-77 Bronco, Medium Duty Leafs, $1795.00
#5000L-HD System L: 66-75 Bronco, Heavy Duty Leafs, $1795.00
#5001L-HD System L: 76-77 Bronco, Heavy Duty Leafs, $1795.00
“Monster” Suspensions
These systems take our Ultimate and Long Travel Suspension all the way with the addition of our Stage 3 Radius Arms, Extended Length Brake Hoses, E-brake cables, a Heavy Duty Bump Stop kit and a Drop Pitman Arm.
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SYSTEM M: 5.5" Monster Suspension
5.5" Progressive Rate Coils, 7° 14 piece Bushing Kit, 11 Leaf Springs, Stage 3 Radius Arms, HD Track Bar Drop Bracket, U-bolts, Stage 2 Shock Hoops, Stage 2 Rear Shock Mounts, 4-8120 Long Travel Shocks, 4-8114 Shocks, Shackle Bushings. *At least a 2” body lift required. |
#5000M-MD System M: 66-75 Bronco, Medium Duty Leafs, $2195.00
#5001M-MD System M: 76-77 Bronco, Medium Duty Leafs, $2195.00
#5000M-HD System M: 66-75 Bronco, Heavy Duty Leafs, $2195.00
#5001M-HD System M: 76-77 Bronco, Heavy Duty Leafs, $219.00
SYSTEM P: 5.5" Monster Suspension - for vehicles without a body lift
5.5" Progressive Rate Coils, 7° 14 piece Bushing Kit, 11 Leaf Springs, Stage 3 Radius Arms, HD Track Bar Drop Bracket, U-bolts, Original Stage 1 Shock Hoops, Stage 1 Rear Shock Mounts, 8-8114 Shocks, Shackle Bushings, Brake hoses, E-brake cables, HD Bump stops and a Drop pitman arm.
#5000P-MD System P: 66-75 Bronco, Medium Duty Leafs, $2195.00
#5001P-MD System P: 76-77 Bronco, Medium Duty Leafs, $2195.00
#5000P-HD System P: 66-75 Bronco, Heavy Duty Leafs, $2195.00
#5001P-HD System P: 76-77 Bronco, Heavy Duty Leafs, $2195.00
Items to consider adding when lifting 3-4":
Stage 3 Tubular Radius Arms #5350, $699.00
Extended Brake Lines #3931, $79.00
Drop Pitman Arm #5473, $64.75
E-Brake Cable #3756, $24.00
Bump Stops #6315, $99.50
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3231 NW Park Dr., Knoxville, TN 37921
Phone: 1-865-938-6696
7am-3pm M-F West Coast
10am-6pm M-F East Coast |
Fax: 1-865-938-6746
24 Hours
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