1970 Challenger master cylinder

Hello I need to pick up a disc brake master cylinder and would like to know which one would look the closest to original for a 1970 Challenger.I am not building an OE car so casting numbers are not important Thanks in advance

You can choose between a '69-'70 disc brake C body master cylinder which has a 1-1/8" bore, or a '71-75 Mopar disc brake master cylinder that has a 1-1/32" bore. Either works fine. Paint the entire assembly black and it looks fairly correct.

Thanks I will check them out