I,d like to purchase a ready to run crawlbox for my truck from Marlin.So I am wondering if it,s worth it since I now have a forward shift setup. I would imagine that i would have to tear down the crawl box and install the top shift in the rear and my exsisting t-case in between the trans and newly modified crawl box. Is this correct? Is there an easier solution to this? Or do I have to find a used donor top shift and only buy the Marlin adapter. I guess either way it is the same pocess only if I purchase the ready to run crawl box I`ll have a rebuilt top shift t-case. What is everyone else doing out there with forward shift yotas doing to acheive dual t-cases please let me know.....thanks