I looked at a 79 Chevy 1 ton dually 4x4 today. It had a full time transfer case in it. It looked like a 205. Had Hi Loc, Hi, N, Lo Loc, Lo on the shifter. The front drive shaft was out and the D 60 had locking hubs. I was able to free spin the front yoke on the transfer case and front diff. Was there ever a full time 205? Can it be converted? Would I want to convert it? Does it sound like it might already be converted? I have pictures of this thing, but have to wait for the girlfriend to put them on my site (I'm a computer dummy). Also, how can I identify gear ratio? I'd like not to remove the cover, but the tire spin and count revolutions of driveshafdt method doesn't seem too accurate. If I have to count teeth, is there a chart to tell me how many teeth equal what ratio? Thanks, Eric M.