Thanks Mike thats good food for thought, i too think the smaller round extensioned car looks great and this will probably be the style i choose to go for with this build.
Going with what you say about the rear wheels inner tubbing is required which is fine i just wanted to make sure before i started changing the chassis and then finding out i shouldn't have
I'll get a copy of Graham Robsons book as i have not seen that before.
Will be going to spa again this year plus also a trip to germany so think i might take a swing by Zakspeed for a drool fest at their showroom
Cheers
James