I have a 1984 f-250 with the 6.9l diesel. does anyone know of a company or have an 8" lift the most i have found is a 6" and feel that an 8 is more fitting for myself. if anyone has any answers please let me know.

 

Anything over 6" if gonna be a custom job. What size tires are you running that you need 8" I fit 38" tires on a 4" lift.

Regardless, you need a D60 under that truck. for more than about 4". I see your in NJ, me too... I have a D60 I'll cut you a good deal on. If you're interested PM me. I may have some other parts you need depending what route you go.

Aside from that, for 8" I'd be looking at a reverse shackle kit on the front with some Superduty lift springs. You can do a shackle flip on the rear with an add a leaf for 6", taller block if you want to be ghetto or a lift spring if you want to do it proper. There are options depending on what you want to spend, but getting 8" out of the front won't be cheap or a bolt on deal.

 

There is a reason why you don't see high lifts.
Have you guys checked the laws on how high the bumpers & lights can be?
How about tire coverage both outside the body and to the rear of the rear tires, think mud flaps.
Just to name a few.
Dave ----

 

6 inch lifts give trouble with shaft angles and such. You are not going to find many people going over 4 inches, mainly because of legal issues. I know a number of later model trucks around here that get lifted that high till they get caught, and then it's suddenly for sale.

 

Legality doesn't really matter, so long as it's safe. Intended use and enforcement in the area of intended use may be more relevant.

In NJ 11" measured from bottom of door for GVWR 7500-10k lbs. So for OP 8" lift would only allow a 35" tire if staying legal. 35" fit with plenty of clearance on a 4" lift. 38" would not likely gain the interest of police around here as that's the largest legal diameter for road use but still would look small with more than 6" lift. Fender flares or lack thereof make you a big target if your tires stick out visibly. Mud flaps as well for taller lifts. Your lighting better be in order. There are other nuances.

Personally my experience to avoid harassment by the clowns police departments here hire (they do not know the law and are not knowledgeable about vehicles in general or suspension specifically) it's best to keep height at the smallest required to clear the tires you want to use. Traction first, axles, lockers, then tires and suspension required for intended use. Keeping the lift minimal and reasonable for the tires used will help avoid needing any government inspection ("tilt test" or special suspension inspection) to legally use on public roads and trails.

 

You might need to do some more research for your state. What they say in this link doesn't agree with you.

Truck Lift Kits - State Rules, Laws, and Guidelines - Sport Truck Magazine

 

That link gives just about zero information about NJ lift laws. I'm quoting max total lift legal on public roads in NJ, yes after 4" suspension (not including tires) special inspection (the "tilt test") is required but this is only loosely enforced (remember most police here know very little about vehicles), typically if your truck appears unnecessarily tall for the tires used, appears unstable, rocking a sweet custom Z-bar drag link painted bright colors to warn oncoming traffic of your impending suspension and steering failures... 6" on 37" or 38" tires but showing some attention to detail is unlikely to raise questions. If it does, the worst likely scenario is you're given a warning to schedule a special vehicle inspection for the tilt test and get the sticker that you have government permission to drive your lifted vehicle on NJ roads.

For most of the state if it doesn't appear scary at a glance and your lights are aimed properly and all functional you won't be hassled. If you're stopped for something else though (open headers or obnoxiously loud exhaust late at night, way over the limit, burnouts on public roads, off roading where not legal, etc.) they will likely make a point of your lack of tilt test sticker. Don't be obnoxious or drive an unsafe truck and you are unlikely to have problems. Total allowable lift to the bottom of the door is 11", what combination of suspension, body or tires doesn't matter.

 

Aside New Jersey Ordinances, like New York, are recognized by few states aside California. The remaining of the "REALITY" States observe Bumper Height Requirements per each state's DOT's guidelines. Sorry but, N.J. & N.Y. is not know all...tell all, as much as they would like to believe.

 

8 inches? I don't see how a lift that size would cause trouble...

 

We could only wish for an 8" lift with no issues...shunts the blood
DOH !

 

There are issues past 4"-6" that take more work and money to do properly and safely.

Front driveshaft crossmember clearance
Front driveshaft angle
Rear driveshaft angle
Track bar angle and mounting
Reverse shackle, partially to eliminate need for track bar
Suspension design and alignment to avoid death wobble
Drag link angle
Drag link interference with leaf spring
High steer (to resolve drag link clearance and angle issues)
Swapping a ball joint axle for king pin if going high steer (late model axle)

This is jsut scratching the surface. The reason you don't see many high lifts has nothing to do with the law, legality, or enforcement as FuzzFace implied. It is because past 4"-6" things get very expensive and complicated. Top it off with anything more is not necessary or practical for most people. You would probably be surprised by what a stock height truck with lockers and good tires can go through.

Here in NJ height is needed to keep the intake above the water and large tires to not get stuck in ruts under that high water. I've swam out of a stock height truck with lockers stuck in ruts, and I've been framed out in deep holes with a 4" lift of 38's. NJ is flat and wet. If you have the sense to drive within your trucks capabilities it's fine, for if you're tempted by the deep or unknown holes, I can understand why someone would want 8" or more.

All that being said, to expand on What'sAChevy's comment.... Unless you've lived in NJ (or maybe CA), it's difficult to understand how things are here. NJ is an oppressive communist paradise. If it's fun, it's probably illegal and you should ask permission from the nanny State or at least tread lightly. The only state I'm aware of that is has more absurd, numerous, and oppressive laws than NJ is CA... It's like NJ and CA compete for which one can be the most oppressive state. I'm patiently plotting my escape.

 

I used to live in NJ. When I lifted my truck 4" I had to go to a location to have a stability test (as mentioned in another post). I received documentation that listed the tire size (33" at the time), number of leaf springs, and height to door threshold. It's been 20 years now - so maybe things in NJ have changed. But I believe one could not pass the state vehicle inspection without this document.
After I moved to FL, I added a 3" body lift (went to 4.56 gears and 37" tires). I did get pulled over and "warned" that my rear bumper was too high, so I had to get a custom tube bumper made.


To OPs question: Have you considered a 6 inch suspension lift and a 3" body lift. That will get you the clearance you want.

 

at this point i dont even have to take the truck for inspection because it is a diesel and i did build bumpers that have a 6" drop farther than stock.