DJM Flip kit #FK1024-5 ??

[85_C10_Sleeper]

I just got my DJM Flip kit from ups today, First thing i did was take the U shaped (axle locater?) And stick it under my stock spring perches. I have a stock 10 Bolt, 85 C10.. The center of the U shaped piece hits the axle before the sides of it hit the bottom of the spring perch. Is this a problem? Im not sure if this is how its supposed to be so you can set the pinion angle...?

Im putting it on Saturday night and just want to be sure before i get everything torn down and realize, OH S**T this doesnt fit.

As far as i know its a stock 10 bolt w/ 3:08 gears.

Its the 85 Dollar one on summit, FK1024-5.

Let me know if you need more info.