That JBA kit is just way overpriced, but regardless you'll want the JBA UCA's.

The Crawl kit doesn't make sense to me... it deletes the front spacer and uses 5100s + OME HD springs, but that limits down travel quite a bit.... actually has less down travel than stock (by not extending the overall length of the strut and lowering the control arm via the subframe, the hub moves upwards). Regardless of what you do, if the overall extended length of the strut is not close to 4" longer than stock, you're limiting travel.

I'm for home brew.