200ci66

When removing the coil on my 66 to install a flamethrower coil, I noticed a little tag attached to the bolt. The tag read this:

"200 66
6-A 2349"

Is there a decoder or something anywhere on the internet that can help me find what this means? I assume 200 66 shows that this is a 200 ci 66 engine, which is the first bit of evidence I've found that this was the original engine (although I always assumed it was.) But what of the second row?

2+2GT

Well, the date code is 1966 January, if that helps. The rest is the engine code, which can be found in the Master Parts Catalog.

wsovonick

Keep this for future reference.