need insight to a-bodies

Theres a bunch of different K frames.

You have early a bodys from 63 till 66, slant 6 and small block used the same frame I think

Then you have the 67 only K frame, small block, Slant six and big block all used there own frames

then there is 68-72, again Small block, big block (68-69) and slant six all different

and 73-76, Slant six and small block frames