Actually managed to do some bits on the car today!!
Using a couple more bits I found in my recycle bin at work (box section) these will be my brackets for the clam. Pretty much the same as Retro200's hinge but most of mine came out of the bin. They will be reinforced with some 3mm stainless plate to give the footprints a larger surface area then bolted and glued through the hardtop.
Next on tonight's agenda is to prime a couple of wheels!
Mick, I don't suppose you removed your hardtop headlining? Easy to do?