[1967 4K]

First thing first, I don’t claim to be an expert first gen Camaro person. Anyone chime in and correct me if I’m wrong you won’t hurt my feelings. The only 1st Gen cars I’ve ever owned were-are 67’s.
In reference to the L78 cars the first ones had the position 4 of the TT as 4P. That code was already being used for the 350CI cars. I’ve never heard as to why GM did this. Sometime in early April they went to the 4K code as is seen in most L78 cars.
If you see a 4P car don’t absolutely think it’s a small block car because it could be an early L78 car. Of course then you have to compare the vin and build date cross referencing things process.
JoeC explained the dash after the 4K well. I think this TT tag is definitely a poor example of someone trying to fake a 67 Yenko car.