C++ default pawn class

Hi there,

i made a project from the c++ vehicle template.
My question is that, how can i change default pawn class in the editor? (its locked)
Or how to create a vehicle Blueprint from this class, which is editable via the blueprint editor and represents the original c++ class.

For example: i need the vehicle’s slip values from the code, but i want add decal shadows, change camera angles, etc. in the blueprint editor.

Thank you!

Sorry for my basic english.