I have a 205 out of a 73 pu that was behind a th350 and it doesn't look like the one behind my sm465 in the 70 Blazer( little things like fill plug the same, but drain is different). Did they have a different case set up on different transmissions/case combos?? I know that behind the th350/205 the linkage was bolted to the side of the trans, but on the 70 model sm465/??? it has a sort of box it sits in with a plate in the bottom with a H pattern for the tip of the 4x4 shifter to follow in. It will not go into 4 low either, it will go in 2H, N, & 4 H in a L pattern but in wont go on up into the 4low position(any ideas on that, and how do i fix it.