I have a 66 F100 4x4 and I fabricated 2" lift blocks and installed them using grade 8 bolts. I want my truck to be safe so I have researched front lift blocks and the only information I can find refers to front lift blocks placed between the spring perch and the springs and these are NOT recommended because they can come loose. because mine have two bolts each running through them, there is no way for them to become dislodged. I have already purchased and installed new springs but I needed to lift it even higher in order to level it out. I am no engineer so please let me know if this is unsafe.

 

I'd either get longer springs or use a poly spacer at the top of the coil in the bucket.

 

To properly lift a coil spring Ford, you need to lower the redius arm brackets and the track bar as well, otherwise your front end geometry will be all outta whack & the truck will drive like hell.

 

thechief66, I installed offset C bushings to accomodate the lift. What is the track bar?

 

I would definitely ditch the blocks and go with a longer spring. Adding blocks to the front end adds more leverage to the front axle under braking and is not safe. The are a lot of companies out there that make taller springs for this application. As posted above, you'll need to drop the track bar (or get an adjustable one which can be made longer), the radius arm mounting points, and use a drop pitman arm also. Hopefully you used the 7 degree offset C-bushings. Is this a factory '66 4X?

 

Yikes!

"C" bushing? Not sure what these are, but if they are what I think they are, I saw a lifted '64 GTO flip upside down when one side broke. Car just basically collapsed on that side when it broke and it just flipped completely over - top down.

2Hick, I think you have taken a bad idea and tried to improve it safety-wise, but it is still basically a bad idea.

 

C-bushings are the insulators which sit in the clamshells that retain the front axle on 4 wheel drive Fords. All of the 4-wheel drive coil spring 1/2 ton pickups and Broncos have them until 1980 when the TTB (twin-trac beam) took over which is basically the 4WD twin I-beam. 1965 and earlier 1/2 ton 4X's used leaf springs in the front.

 

Yup, I'm thinking of something else.

From the driveshaft pic, looks like that thing sets pretty high.

 

Longer springs ,lowered track arm mounting bracket,7 degree offset bushings and a set of 2" radius arm drop brackets. An alignment is critical as caster is really affected with this type of lift

 

Jhooch, yes it is a factory 4X4. I did install an adjustable track bar and a drop pitman arm but the kit did not come with brackets to lower the radius arms. I don't remember what the offset was for the C bushings but it wasn't 7 degrees. My build was interupted when the garage burned down. I will look into longer springs and radius arm brackets.
Thanks to everyone for the input.