After thinking about the crack and looking at early photo's of the fibreglass shell it looks like the fibreglass body is fine.The crack must be from the bodywork after welding in the new tunnel section from the firewall as the body originally came with a half hexigon shape from the firewall and we welded a curved sheetmetal section from there to cover the gearbox.The split must be from the body filler installed. Bitch.
Will scrape out a bit and fill it with Sikaflex and then paint