What is the typical stringer width for offshore mounts with a bigblock? my stringers were 30 inches apart originally

i feel like i read somewhere it is a standard width

^^^^^^

Just got home from Cumberland.
I will measure tomorrow after work if nobody has responded.
Do you already have the mount? My boat has a Gil front mount.

Im using a trs setup. i dont have a mount yet thats what i wanted to know if there is a standard width. The gil offshore mount seems to be the way to go