Illinois Hwy's 67 - 125 - 127 - 64 - 14 - 45 - 145

Used to live in that area and I don't remember ANY "attractions" along those routes that would make it worth while taking the 2 lane roads.
There may be some exceptions though.

The condition of those roads can be "iffy". Or at least that was the case 5 years ago. Some sections real good and some really BAD.....and a lot of them fairly narrow.

Any towns along your propose path that you thought would be interesting ??
It might be easier to talk about knowing the towns involved.