Rear Minilight Size

[Bmac800]

Hi we have bought an 80s Caterham 7 which we have stripped and rebuilt and now need a pair of new rear wheels to replace the 6" Minilights that were on it.We were going to get a pair of Minilight replicas from Midland Wheels but are unsure of the size/offset needed to fill the arches out better without fouling anything -

would a 13" x 7" with ET7 offset as in the link below
http://www.midlandwheels.com/Shop/P-2661-7-x-13-JB...

or a 13" x 8" with ET6 offset as in the link below be better
http://www.midlandwheels.com/Shop/P-2606-8-x-13-JB...

The car is running a 2 litre Raceline Zetec engine on throttle bodies and we have 6" Minilights for the front.We were planning 185x60x13 tyres on the front and 205x60x13s on the rear.
Any help gratefully received.

[russelli]

I have had two sets of KN minators in 7 x 13 for the rear of my car from http://www.tyresave.co.uk/alloyskn.html
they have always been knowledgable about ET and backspace, i think mine were ET24, this gives clearance on anti roll bars and the de-dion bar although earlier de-dion bars may need a little filing off. didnt notice if you were live axle or dd