One more thing i forgot to mention is the Schumacher big bores are shorter then the durangos by around 5 mm between the mounting centers. this will reduce the droop front and rear .The amount of front compression is the same but the rear is less so the rear might bottom out on landing. to increase the rear compression you could use the short ball grippers but this would decrease the rear droop even more by around a further 5mm. you don't want to be doing this. on the front i have fitted 2mm of internal spacers in the durago shocks as i have too much droop anyway but feal that fitting the schumacher shock would take away far to much Droop and not work right.
So After all this
Don't Bother 
Have fun and I'll see you all at Leverton If i can find it and don't end up at Skeg.
Cheers dave