I'm planning to swap the TH400 in my M1008(85 K30) with a 6.2 to a NV4500. I'm at the ground floor here as far as collecting the required parts. Has anyone done the conversion and did they do it without buying a kit? I would rather try to get it all done with junk yard parts rather than a $1000 kit, but I will do what I have to. Any advice?