I have a 88k5, that is going through a tranny/transfercase swap sm465/np205. I also did a 57" ford spring conversion in the rear, with echobit shackle flip and lowering shackles. I used the longer side of the spring toward the front giving me a longer wheelbase. What would my D-shaft lenth have to be? Would a shortbed shaft work, due to lift and extended wheelbase?