Andy had the plug for a bonnet with an almost full width full length bonnet bulge when he took on my Roadster moulds, if memory serves me right it's about 3" high....google Westfield V8 and you will get some idea of what I mean as I can't find the pictures I had of the plug sorry.

I'm sure he said he had made a start on it but I know he was busy with the single seater so best ask him