Here are the front deck measurements of these three boats.
Width:
Front edge of the seat post
919 - 65"
721 - 60.75"
920 - 65"
921 PHX - 66"
Back of trolling motor pedal
919 - 53.5"
721 - 50"
920 - 53.5"
921 PHX - 54"
Length:
Rear of trolling motor pedal to back edge of deck
919 - 60"
721 - 67"
920 - 68"
921 PHX - 78.5"
Seat post to front point of the boat
919 - 66"
721 - 66"
920 - 66"
921 PHX - 66"
Rod locker lid length
919 - 49.75"
721 - 52.5"
920 - 56.5"
921 PHX - 59.5"
Kenneth