The Gen IIIs were designed for manufacturability, so many of the connectors, fittings, and systems are not familiar to hot rodders, which can lead to a frustrating, expensive experience trying to remove an engine. The book "How to Build High Performance Chevy LS1/LS6 V-8s" has one chapter dedicated completely to removing and reinstalling the Gen III engine. It has more than 160 images to show how to remove the Gen III from GM fullsize trucks and SUVs, along with the Corvette, Camaro, and Firebird.
Gen III GM Small Block Tech