I currently am running the 3" TerraFirma kit. Since adding rock sliders, bumpers, winch, recovery gear and BajaRack roof rack I have lost about 1" of ride height.

At this point I am trying to decide if I should swap to different springs or just add a 1" spacer front&rear from Columbia Overland.

Suggestions?

 

"rock sliders, bumpers, winch, recovery gear and BajaRack roof rack" I asume you are goinng offroad. Then I think the unifided answer you are going to get is do not run spacers, to much likelihood that they can fall out.

 

Sounds like you added all the gear after you already had the lift?

You need to go with a heavier spring rate. If I were you(I'm not), I would contact Justin at Lucky8 and give him the rundown on what you have for equipment, he can tell you what springs you will need to get back the height.

 

I would also suggest changing springs, the ones you have do not match the load rating you need and adding spacers, although a good idea with H.D. springs, will not give you the ride and performance you need.
I would really suggest you get away from the Terra Firma coils and go to a set of 751 front OME coils and 762 rears,
Just to get a better ideal on your current set up, measure the height of your front and rear wheel well, from the ground thru the center of your wheel to the bottom of your wheel wells and get back to us with those numbers.

 

Yeah. I ordered suspension first and was suggested to use the TF 3" kit which was suppose to be appropriate for adding gear to the truck.

My ride height is ~36" at all 4 corners. I am running 285-65-18LT nitto trail grapplers.

I am not concerned About spacers falling out as they bolt in place between the spring perch and the axle.

How much higher are the rates on the OME 751 & 762's?

 

751 will run 36.5 and never drop under load, 763, the extra H.D. rear coils are load rated and will not drop under really heavy loads.
I have a 240 pound bumper and dual Yellow Tops and my 140,000 old 751, running 265/75/16's have strayed at 36.5 for the 9 plus years I have run them.