I keep getting different information on some of this engine/VIN decoding stuff, and it's getting confusing. Basically, I want to verify that: 1. My 71 is a real GS (43437 says it is) 2. It has the original engine (serial code on block matches the VIN). 3. What does the engine code mean? I read somewhere that this code means it had a 2bbl? 4. Why doesn't the Serial Number on the body tag not match the VIN? Any help will be greatly appreciated and help me sleep at night. VIN: 434371Z122834 Body Tag: 71-43437 Z 01375 Engine Code: D/230? Engine Serial: 171Z122834?