Looks like your ride is matching #.
Best you can do is decode your vin and check your build sheet and compare it to the 440-6 packs built.
Take the best match and add your color.
My Deep Burnt Orange 70 Gran Coupe convertible is 1 0f 66 built with 383 4bbl 335 Heavy Duty 727 trans, full options, add color and M88 it is probably 1a fewwith white top.
It also has the M88 trim on rear panel but I do not have any documentation on build sheet or vin tag. No cruse control only thing missing from options on the car.