Those boards look great.
I'm also making my own dovetailed floorboards for my 28 Phaeton and early 29 Tudor.
The boards were not only random in width, but one end of a board can be up to about an inch different than the other end. When this occured the adjacent board would have it's wider end next to the other board's narrow end. It took me a while to find the correct dovetail router bit with the right angle and width, but I finally found one at the local used tool store. My original and remake floorboards are Maple, and Menards had the right thickness Maple boards.