How come the answer sent for 365 V8 Cadillac only has 7 cylinders 1-8-3-6-5-7-2 and answers com wiki page also gives standard GM 1-8-4-3-6-5-7-2 Is engine that year?

The engine in the 365 Cadillac V8 is indeed an 8-cylinder engine, not a 7-cylinder engine. The firing order for this engine is 1-8-4-3-6-5-7-2. This is the standard firing order for GM V8 engines, including the 365 Cadillac V8.