Not sure of your question. Do you want to identify it by its original decal? Or your individual engine's power?
The "rating" is not the actual power of the original engine, merely the number the factory chose to publish, tested under ideal circumstances (GM "Test 20" with controlled air temperature, and minimal accessories).
Your engine is not stock, and won't produce that number either.
There is no accurate method of projecting how much yours makes.
