Spiders love buses especially Westies where various flying insects always become trapped in the roof when elevated.
i'll post this here just in case someone else ever comes across it, before I fibreglass, it seems two 8" squares were cut out at the back of the van (sleeping area) rear where the tailgate is, but centre over the engine, if you know what I mean, any ideas why someone would have done this?, smart arse remarks are more than welcome if you feel you need to p*ss on my fireworks.
Maybe for access to the carbs although 8" probably wouldn't be big enough (not an issue for some....) Or access to the fuel tank sender and they cut the first hole on the wrong side.
The first thing I did in my bus when I got it was to see if the dimmer switch worked for the dash lights and it does cool!!!