In '83 the 2.8 V6 used a rope seal. The one-piece seal wasn't designed/put into the engine until '85.
The '83 rope seal is a pain because part of the job requires compressing the seal with a special tool from GM(or equilvalent). Trying doing that on your back, in the driveway, with inadequate lighting, and the block(yes, the oil pan has to come off) dripping on you, your face, & any helpers you may have.
83 S10 4x2