Are 26 inch rims to big for a 305 engine?

It is not possible to determine whether 26-inch rims are too big for a 305 engine without knowing more about the specifics of the vehicle. Factors such as the make, model, and year of the vehicle, as well as the size and offset of the rims, all play a role in determining whether or not a particular wheel and tire combination will fit properly. It is recommended to consult with a qualified automotive technician or wheel and tire expert to determine the appropriate wheel and tire sizes for a specific vehicle.