Wow, finally someone who speaks my language!! I am just making an educated guess on the six bolt mains. I went downstairs and looked at the sides of the block down by my oilpan area and there are bolts coming in from the sides LS style. They couldn't really be anything else. I am running a married 205 off the NV4500 on a GM gen III 6.0 whith some bells and whistles. Fortunately there are provisions for my slave cylinder in the bellhousing and they make an input bushing that mates everything up nicely. I originally looked at the T-56 magnum as a possible choice, but 2WD isn't going to get me there. Better gears though.