The Pioneers sold here are 1642s. The base looks to be the same as yours, but the tweeter looks more complex. I think that part is wasted because supposedly only base sounds are sent to this speaker location.

Crutchfield says theirs are sent with adapters specific to the vehicle, so the installation should be easy. They do say I will have to spice the wires. I wonder if the 5.25 size would be more compatible, more the same frequency response as original.