Does anyone know exactly what is checked during inspections in Texas? Do they do a sniffer test? Last time I went, it seemed like they just checked all the lights and signals, and drove it around the block, I didn't notice any probe or anything hooked up, but I didn't pay a whole lot of attention. Are the rules different for a car from the 60's-70's? I'm curious because I'm thinking of fixing up an old beetle, and wondering what i can legally get away with as far as the engine goes.