I've done my research and have concluded the general consensus is that a 4" lift requires a longer front driveshaft, extended brake lines, an adjustable panhard bar, extended swaybar links, extended watts links, and caster-corrected radius arm.

The lift will consist of 2" coil spacers and TerraFirma 2" coil springs, and struts (not sure which ones I'm going to get yet- possibly the Terrafirma 4 Stage Adjustable +3 Shocks).

However...
I am in desperate need of tires and do not want to spend the cash on all of those extra parts right now, since Christmas is around the corner and the tires are going to be over $1,000. Will it cause harm if I install the 4" lift, get the bigger tires, and drive the Disco temporarily? As in, to go to the tire shop for tire install and for an alignment?

 

Can't answer the lift question. But I bought 5 Toyo Open Country AT3s in 225/75/R16 last week and had them installed for 879, so might be less than you're anticipating unless you're thinking of huge tires.

 

Driveshafts might not be happy.
Your front axle will move to one side (because on panhard).
Brakelines might bee too short for any non level ground driving.
etc.

I have the +3" 4 way adjustable terrafirmas and I would be looking for something else if there was something else.
In just over a year atleast one of the shocks had the bushes gone, some slight leaks and they look bad after a few years of daily driving, and salt in the winters...
And they only came with a 12 month warranty so s outta luck. Replaced the one shock bushes with polys. Still havent done it for the others tho.. should have, do have the polys but never got around to it..

 

Tires are a safety item so spend your budget on new tires and if there is anything leftover give the D2 some maintenance love.

 

I would highly discourage running a 4" lift without at least an adjustable Panhard. You can pull the clips out of the brake lines and the shocks will be fine for street driving. Steering wheel might be 90 degrees off going straight. Without the panhard your axle will be way off center putting everything in a bind. Not trying to be a jerk but you are driving the wrong car with the wrong ambitions if you aren't financially able to swing those cost. I was a skeptic at first but a well sorted, properly lifted DII on good 32's will take you way further than you think.

 

Just don't get the tires leave the rest alone, once you get beyond a basic 2 inch lift, you need to spend a ton of money the short list:

Corrected radius arms
Extend brake lines
Extended speed sensors
Front and rear drive shafts
Extend sway bar links
Extend watts linkage
The adjustable panhard bar
A damm sight better springs than Terrafirma - they don't stand up

And almost all of that is custom, you are not going to find much off the shelf to support a 4 inch lift.

 

We did the TF 3" kit from Lucky 8. 3 years or so of daily driving. No towing or camping. One rear spring does sag more than the others, plain on installing a spacer to even it out when I get the time. Came with all the necessary parts other than new tom woods front drive shaft.

Fits 285-70-16s. The tires on stock rims will rub at full clock on the inner fender.

About 1000 for lift and drive shaft back then. Another 600 for tires plus mounting, balance and alignment.


The vehicle did fine at 70. Past 70 shed star to shimmy. Going up hill the old 4.0 with over 200k wouldn't push 70. After putting in a fresh rebuilt 4.6 she ran it 80 for an extended period of time and vibrated enough to break the mounting tabs for the gauge cluster cover. The disco in stock form isn't an 80mph rig in my opinion and shouldn't be operated as such.

 

My post specificized "temporarily." See this quote, at the end of my post: "As in, to go to the tire shop for tire install and for an alignment?" I tried to add more details in the subject but wasn't able to due to the character limitation.

All of the above-mentioned goodies mentioned in my first post will be added shortly after the tires and lift springs. After the tires and lift, the Disco will then sit for a couple of weeks until I purchase the other parts to complete the lift. If not wanting to drop 4-5k at once on a 22 year old vehicle, 3 weeks before Christmas, means I can't afford the Disco, then I suppose I can't.

If the wisdom of the crowd is that even a short trip back from the tire shop will cause damage, I'll defer to it.

 

This disco 2 is solid axle. Put some sheets of steel, aluminum or even some vinyl floor planks under the tires and do a 1/16"-1/8th inch toe in with some scrap channel iron beams against the tires. With 32-33" tires I'll set the channel on cinder blocks and pressed flatly gently against the tires for measurements.

It's not perfect but will get to the alignment shop without risk of tires of wearing half bald on your commute.

 

Thank you for the suggestion. I appreciate it.