67FordKC; I ain't douting you have the original motor in the car.
I am just telling you what my book is saying, I know that alot of the time the factory's would take a engine that was built the year before and stick it in a new car on the line.
But f you are seeing the C7, I was wondering if in fact you don't have a 390,410,427 or a 428 block in there. Which all of these were made in 1967.
Like Hotrodstude said his 428 had the 352 cast in the front of his block.
If the block is a 390,410,427 or 428 you could drop a bigger crank in it with no problem.
if it's a true 352 you can't because he crank will hit some stuff in the swing.
It says some of the high performance heads won't fit because the tops of the cylinders will have to be notched to far out to allow for the bigger valves.
Though the bore spacing and all is the same.
In any case you sure have me curious, I hope some one else chims in that has some first hand knowledge. I am hoping you actully have a 428 block with a 352 crank and rods in which case you could use the high performance heads. And yes the crank would fit in to all the engines above mentioned. They are all the same dia. and bore spacing.
Kurt