I cut the slot in the arch to get a better idea of the fit - The top of the arch does sit flush with the wing, but the rear of the arch behind the seam has a 5mm+ gap and the curved part of the front has to be phisically forced into shape to get anywhere near the front panel and required alot of material removing from the front edge to get it to even get remotely close to the curvature of the bodywork.
So on sunday i'm just going to be sitting on a stool with my sander sanding and reshaping the arches and constantly trying them against the car to get the right shape. I'm just hoping that once the brackets are riveted on the bolts holding them to the wing will help pull parts of the arch into shape.
So yeah not too happy with those to be honest.
There is some good news though, i cut the rusty moustach extensions off the grill surround:


Then got that screwed in place:

I then marked up and drilled holes through the new grill to mount that with the grill buttons - It looks great, much nicer than the later style grill. Definatly worth all the effort of removing the bonnet lip and things:

I also cleaned up the indicator wiring so i can wire in the new units i've bought once i get some more bullet connectors. I tryed to adjust the bonnet but couldn't get it any better. I then realised that because the bonnet i bought has both mk1 an later type hinge mounts the earlier type hinge mounts were hitting the scuttle as the bonnet was closed! So i've got to cut back the offending areas to allow the bonnet the close nicely.