If anything needs replaced on the inside you could get latches and stuff from Wilson or Merritt and convert them over.
I never pulled a Guthrie but I did pull an old Merritt before they had the rows of big holes on the trailer, and I can tell you than a trailer with nothing but small holes wasn’t a lot of fun in the wind.
The upside to a Guthrie was their white sides. So no stained or streaked aluminum.
