ECM...... Engine control module? Do you like, want to know who made the microprocessors on it? I know there's lots of cool stats and specs about the Camaro, and there are cool specs about every car people talk about...... but, uh, sorry, I've never in 25 years of messing with cars, reading car magazines, building countless model kits, and following the entire auto inudstry has anyone ever asked about or talked about the specs of the engine control module.
We can tell you everything you need to know about brake rotor sizes, engines, exhaust, drivetrain, interior, and yes, I can tell you the basics of how an ECM works and why modern cars have them, but I don't think you can find anyone who can tell you what the differences in ECMs between cars are.
UNLESS you mean removing the speed governor and engine tuning...... Then, you have a whole new ball game that many people here can help you with