My experience with the overlay is that it’s not that close to original. Maybe if you are replacing all of it you won’t notice. Here are 2 shifter plates ....one original and the darker one is the repop.
I have several pieces for sale now that I am making some changes to my 70z28.
All prices plus actual shipping
SOLD....Woodgrain steering wheel shroud....almost perfect with RS emblem $175
SOLD.....Woodgrain Auto shifter plate...near perfect.....$225
Woodgrain Auto shifter plate...center piece...