I think cr's later car was more a recreation of the dino. I agree with you that the inboard part looks welded to the chassis. And yes the real one used 'U' shaped washers to pack out the bush/wishbones.
Most kit cars used a bush that has a thread that can be screwed in or out to adjust it instead of adding or removing the 'U' shaped washers. In the case of the dino only the securing nut would need loosening to do the adjustment where as the kit wishbone would need completely dismantling.
I'm going with 16" replica cromadora wheels which allow me a larger choice of braking components. Looking at bespoke alloy uprights which should come with the right kingpin angle and inclination. I'm also copying deon front suspension. But something along the lines of a stratos rear setup.
I'm going to build my chassis in wood first to check everything works-easier to correct alter!!!