Is it possible to put a Cat E1 or Super Six e.t.c bonnet and nose cone on the Avon if I'm fitting a 2.0l Zetec. I like the the look of these better than the one for the Avon.

No.
The Cat etc. nose and bonnet are a lot narrower - unless you're up for a bit of fibreglassing.
Pat...

Fuz

I converted from Crossflow to Zetec and needed a higher nose. I ended up using the Lolocost nose which was OK for quality and lighter than the previous one - there's some info on http://www.locostbuilders.co.uk/viewthread.php?tid=22785&page=2

Regards

Wyn

Cheers fellas, nice one