As for the going to manual engagement for the transfer case, there are not really any options for this. The transfer case you have if I'm correct is a Borg Warner 13-54, the only options you have are going to an older ford ranger and picking the t-case out of one that had it, i believe 93-97 had the best ones I may be wrong, or going to an Atlas II twin stick. other then that I don't know of any other options for rangers.