Grunizzle’s 1991 Ford Ranger 4×4

I loved the factory color and STX stripes of Grunizzle’s 1991 Ford Ranger 4×4. The combination of the factory colors and the blue James Duff suspension and black wheels makes for a nice looking 4×4.

But as you can tell from the lead photo, the truck didn’t stay like that long. The 1991 Ford Ranger has been constantly transforming in to hard core trail rig with every modification.

Here are the specifications:

1991 Ford Ranger STX 4×4 Extended Cab

Engine and transmission:

351W V8 (with GT40 intake) from a 1989 Ford Bronco*
Engine bored .30 over / Keith Black 11:1 pistons
1.7 roller rockers
Comp Cams Extreme 4×4 cam
Hedman 88400 headers
ZF 5 speed transmission from F-250
Atlas 2 speed transfercase 4.3 ratio
Twin sticks


James Duff 78-79 Bronco radius arms
James Duff panhard bracket
King 2.0 14” travel coilover 200/200
Fox 2.0×2” bumpstop front
Knuckles and pitman arm reamed for Ruff Stuff steering kit
Custom triangulated 4 link setup
2”x.250 links
Ballistic Fab flex joints
King 2.5 16” travel coilovers 100/150
Fox 2.0×3” bumpstop rear
TK-1 racing sway bar


Ford 9-Inch rear axle with 4.56 gears, Grizzly Locker, 35 spline moser chromoly axle shafts
Fullwidth Dana 44 front axle with Yukon chromoly shafts, Yukon hardcore locking hubs, 4.56 gears and Grizzly locker
Ruff Stuff diff cover

Tires & Wheels:

37×12.50 R17 Goodyear MTR Kevlars
Procomp 17×8 wheels with 4.5-inch back space

Other Features:

2-Inch body lift
2×6 rectangle tube sliders
Custom bed / cage
Custom bumpers
Smittybilt XRC8 winch
Jaz 22 gallon fuel cell
Summit fuel filler kit
Holley in-line fuel pump
Jegs pre pump filter
Sony Xplod ipod deck
Speedhut gauges
PRP premiere seat & 4 point harness

More Photos:

(Behemoth Drivetrain Doubler)

(custom gauges)

(custom console with B&M shifter)

(Monstaliner on floor)

Recent Photos:

Click the photos to enlarge – click the arrows to load more.



Grunizzle’s stRanger (Click for more photos and details)


Behemoth Drivetrain Doubler

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Follow Jim Oaks:

As a Ford Ranger enthusiast who enjoys modifying my Ford Rangers for off-road use, I quickly discovered that there wasn’t any websites dedicated to the subject. So in 1999, I created What started as my own personal desire to help other Ford Ranger owners, has grown into a wealth of online information from numerous contributors. 20-years later, my commitment to the Ford Ranger, and the Ford Ranger community, is as strong as ever.