1966 dart convertible

How do I identify parts???? I googled the mopar parts search, drew a blank. Trying to figure out if this is the correct shroud? Part #s say.
3869812
78071
Nothing comes up???????
It's a 22" radiator I think for a 273. Had the lower hose inlet placed on the correct side. Bolts up, but fan and shroud aren't working out?
Thanks