I ended up drilling a hole up from the bottom of the beam wide enough to get my die grinder into. From there I made the hole just large enough to get a new nut on the end of a magnet into position. A bit of grinding paste on the nut surface help it grab instead of just spinning when I put the bolt in. I wont be able to weld over the hole to cover it because that nut is going to fall off whenever that bolt is undone.

JB weld the nut into place?

That sounds like a good idea to me. Finally I have a reason to get some jb weld.

Couldn't you use a large nut set? How are the other threads held in, are they welded on the back?

Yes they are all welded on the back

Well here it is. It's ready to turn over. Everything's hooked up and the ECU reports all sensors are good. But I ran out of coolant this afternoon and I'll have to get some tomorrow. Got a bit frustrated by this and pushed the car out and gave it a quick wash. I'll have to go back later and give it a good polish, there's some areas that've copped a bit of a rough time while the car's been garaged on/off over the last 12 months.

Great to see its almost ready. Will be a great feeling to be driving down the street.
Best of luck

Hmm, something is wrong, the skids videos are not loading

Cruise tonight?!! :P

 
After sorting out some electrical problems it fired almost perfectly .