Templates for a Quadzilla

Does anyone have templates or atleast measurements for a 9’ - 10’ longboard pintail w/ a quad fin setup?not sure if the fins would add too much drag, consequently requiring the board to be narrower than normal. (side note, im making it out of cardboard boxes w/ triple wood stringers… that cardboard fish thread inspired me). Any general measurements / advice is more than welcome, thanks.

 

oh, the area I’m surfing is florida gulf / louisiana gulf, so its slow mushy waves, nothing more than shoulder high… and yes, there are a few spots to surf in louisiana… just have to wait for the tankers to pass by.