I'm looking at different kits for bringing life into my AOD. I found B&M transpak and Transgo AOD HP and also Silverfox and Bauman have kits. I am looking for one that doesn't require taking out the tranny. I read somewhere that some kits make doswnskift from 2->1 (which is interesting). I am not looking for harder skifts (skift improvers). Any recommendations?