So this is what I went with after consulting the hivemind.
I reshaped the wheel arch and added a mudflap.
The front profile will change, some pieces are not yet attached for ease of painting, and most of the weapons are magnetised.
I say most.. I have a habit of magnetising a full set of weapons then only running it in one configuruation but codex changes still make this valuable (for instance if i paint some already magnetised rocket pods, my expensive low capacity vendettas can be valkyries)
There we go, one slightly less goofy looking (imho) APC.
Thanks for the input chaps.