Intake manifold, which temp sending unit??

The car's a 67, had a stock 2bbl when I got it. I just installed a factory 4bbl manifold. Everything fit until I got to the temp sending unit, my old one is too big. I read other threads about decoding and figured out that the manifold is a 64, but the sender for that year is slightly too small.
I have tried several part counters, no luck. It can't be adapted since the manifold is not pipe thread, it's more fine.
Anyone know the part number I'm needing?

Manifold # C4OE-9425-B