My brother Jason bought a Chevy truck (I know its not a Blazer but it is a Chevy), that has a fourspeed and a tranfercase out of a 2 1/2 ton (we think). The transfercase is larger than a 205, but it is not a 203 (it's bigger). High range is not straight through, and the rear drive shaft is lower than the transmission input, and it is bolted to the transmission (not divorced). We can't find any tags or obvious identification. Any one know what trasfercase this might be?