Last year I called up marlin b/c i was debating on doing dual cases, or getting 4.7 crawler gears, but in the end some other things came up and i wasn't able to get either lol. Anyway, he told me i would have to upgrade the input spline on my transfer case if i was to get crawler gears instead of dual cases, which was extra. But it looks like on the site that it's included in the kit, i just took his word for it.

87 22R PU, 2? body lift, 33? BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.