Are these the right heads for my wife's car?

[swoopNZ]

Well it looks like 81.
If it has the longer ( and bigger ) crankshaft, then it's a 39-41 engine.
There is room to mount a six bladed fan at the end of the crankshaft if needed ( for 39 deluxe )
The block with 81 stamped on it but with the shorter crankshaft is the 1 year only 1938 engine. ( fan mounted on the generator )