92 Blazer Wiring Harness Replacement

Due to a major engine fire, the engine compartment wiring harness on a 92 S-10 Blazer with a 4.3 liter automatic 4WD must be replaced. One is available at the salvage yard but it appears the dash must be removed to access all the connectors. What is involved in removing the dash? Are there any good manuals that cover this subject? jp