For what it's worth my 410 looks right at a ride height of 6 1/4 inches between the underneath of the front cross member and the floor, measured underneath the suspension arm mountings. The bottom suspension arms are to all intents and purposes level. 
 
I had the opposite problem, in that the torsion bars had sagged. Resetting the rear arms on the splines to achieve a level stance improved the handing considerably. 
		
		
		
		
		
		
		
	
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