67 V8 radiator in a 66
Sure looks it. Time for tape measure, paper and pencil.
When I've had to get replacement radiators, I've used cardboard to trace over the mounting flanges etc of the radiators and the openings. It helps when figuring when figuring out what's different.

And this - which is a 68 with 70 bottom tank.
IIRC the 70 tank is taller than the 68-9 tank so the core has to be shorter.
First try didn't fit.

Measure this
and then these
