I would measure the frame right in front of the front spring hanger and right at the rear of the rear axle hanger to the ground for both.
I venture a guess that there isnt going to be much more than 1"-1.5" difference. If thats the case I personally would worry about it, the equilizer will easily compensate for that much difference.
I always run nose high on all the trailers I pull. I am running about 6" higher than stock on my truck, and have never had an issue with any trailers, and all my longer trailers (30'+ and 1 is tripple axle) are probably the same 4-6"+ higher in the front than rear.
Well, Other than one state cg my tail almost drug going up an incline to our spot.
After measuring suspension points I would call lippert and ask what the tolerances on suspension variation are, before I spent to much time and money on it.
Just my 2 pennys....and of course that and a dollar thirty five might get u a cup of coffee ; )
MillerTime- Future Sabre Handler!!