Need advice on which OME springs to buy. I am trying to get a full 2 inches of lift from my 2000 Disco II and want to buy the OME heavy duty springs since I am adding a new bumper and Warn winch. I also use the car to tow both a heavy utility trailer and a boat.
Which OME springs should I use?

751 (from a Disco I) front / 762 rears
766 front / 763 rears
or another combination.

I dont mind if the ride is a bit harsh.

 

No question, 751/762's are the only way.
The front will hold that extra weight and not collapes and the 762's are pretty much an equal for height.

 

Will I need to shim the 762's in the rear if I use the 751's in the front from a D1?

 

Are you going to be installing a winch and bumper?
If no, yes you'll need to put a spacer under the 762's, if you are going to be installing the winch and bumper then that weight will pull the front end just about level with the rear 762's.