Michael,
You may want to explore running some flex hose instead of the rigid factory lines. You should have some space to route the lines above the FG rocker where it curves under the body. It won't be "factory" but again, neither is the body kit. Should be fine as long as it looks neat and professional and works to transport oil back and forth. Try -16 lines first as it has a slightly larger ID (and OD) than -12. Stainless braided hose is pricey and not necessary. Not sure about your cooler location, but it's better to mount it in the front bumper.
MHO,
Sherwood Lee
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