98 and newer Blazer core support will work with the 2000 grille and headlight. I don't know of any reasons the 96 hood and fenders wouldn't work with your 2000.................
1998 Blazer LS 4dr 4WD Burgandy/Silver - needs engine
1998 Blazer LT 4dr 4WD Black - hail survivor (barely)
1999 Blazer LS 4dr 4WD White - plow truck
1999 Blazer LS 4dr 4WD Black - parts donor
1998 Blazer LT 4dr 4WD Black - engine & parts donor