I am curious about the 4" flip and how much it moves the axle towards the front of the vehicle. I have read some post about this and wanted to see if it is that big of an issue. I installed some 5.5" BDS springs in front and purchased the flip for the rear. I was going to have my factory springs re-arched and possibly add another spring to get another 3" from the rear springs. I have a D60 up front that adds another inch above the 10 bolt so I am looking at about 7"s total in the front(BDS springs are taller than they advertise). I talked to Stephen at ORD today and he suggested having some longer springs made if I had problems with the factory springs offsetting the axle to far forward. After talking to Tulsa Auto Spring to today I can have some new ones made for about $125 Each, not bad. If you have installed the flip let me know what you think.