Hi was wondering if these would fit on my kit car?

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=270712280880

its a MK Indy and based on a Sierra, need smaller wheels before i take it to the ring as the handling is off and drives piss poor with the 17 it has on now. Havent got to my ride height to play with so looking for inch off the wheels and maybe a smaller tire and thats it. think these would look pretty smart and hopefully will fit.