67 318 running temps in the summer

You could get either in 1967. In 1968 you could not get a poly
In 67 only a 273 was available in A bodies. You could not get a semi hemi in an A body

In 68 both 273LA AND 318LA were available.


67 casting dates does not mean it is a 67 318.

Under the front of the drivers side head there is a code stamped into the block

My bet is yours starts with a D = 68 model year

How to ID a Small Block Engine Block:

In this example the block was cast in 63 but the engine is for a V = 64 model year car. Screenshot_20240821-213853.png