Thanks for those answers. I had hoped to use Grade 8 for peace of mind and appearance but can't find them over here anywhere, nor it would seem able to ship them over... I've shipped a whole car, loads of replacement panels and paint over, but no-one wants to post me nuts and bolts, it's a little weird.

I haven't updated my site in a while, but have been working on the car albeit slowly. All of the welding and grinding of the body is done. It's currently away at the shotblasters (again) and should come back to me by Tuesday. From there it's underseal and back onto the subframe (finally!).