IIRC a 65-gallon has the same footprint as a 40-breeder but it's taller. So maybe for one of the smaller locality BCI's, IF you trust the seller to have critters that are pure and not crosses. Obviously you will have to add some modifications to maintain proper temperatures and humidity.
It will do for a common BCI for a few years, though an adult will need a larger enclosure. A true red tail BCC such as a Guyana or Suriname will also outgrow it.