help to make custom radiadtor scoops PLEASE!!!

hi there im looking into building my own scoops and i was wondering if i can get some help here i have the material and i have the tools

Im wondering about the deminsions of the scoops cuz i dont have any or owned them, im mainly looking for the length across the top(length from radaitos to the bend, angle of bend, and length from bend to end of scoop(top)) and the length across the bottom( length from bend to end of scoop)

and i know some have added stuff to like a fold down on the top and a flap the extends out and up at the bottom

but wondering if anyone can help? pics would help alot too