I have the stock rear spring CRD (2.5) size:
30,5 Cm. Your's will be shorter since mine is a pre-lowered KJ.
The stock shock won't do you any good when you lift...OEM on the right...Rancho (which you should use) on the left.

Did you check out Jeepinbyal.com? He ships all over the world. USPS so regular mail at good prices.
In order for 'them' to make you some front coils they better take in account that your 2.8 is very heavy and that your spring will have to have the same specs as the OME 790...500Lbs/inch...that's a pretty tough spring.
And they need to make them longer..this is an OME rear spring next to an OEM one standing on a 2.5" Daystar puck.

3" is in my book the highest you can go on a CRD without making life hard on the CV's. 245/75/16 will then fit nicely.
