I am looking for an actual coil lift not a BB. My goal is to run a tire that measures 35.5" while mounted. I plan to do this with flat fenders and a small coil lift.
So, what you're saying is that you really wanting to run a 37" tire or slightly taller. That is after all what ALL tires that have 37" written on the sidewall measure up to in reality or even come up just a bit short. Being that's the case, you really need to be looking at a 3" lift or more and you should also be looking into new gears to help make up for the loss in power and a new front drive shaft. Of course, this is to say nothing about the components that you will really want to help keep your Jeep handling well on the highway. Are you adding up the dollars here?
Now, if you're wanting to run an advertised 35" tire, as in, that's what it says on the sidewall but will have an actual measurement of about 33", you could definitely get away with a 2.5" coil lift especially being that most will yield over 3". Even at this, you will ruin your front drive shaft the first time you go off roading if you don't install exhaust spacers and even if you do that, the CV joint will fail sooner than later due to the extreme angle that it will sit in. Also, at 3" of lift or more, your Jeep will feel flighty at highway speeds unless you buy parts to address your caster.
I could go on but before I do, is this really where you are wanting to go?