[928uk] Will these wheels fit?

[Alan Baldwin]

All

I have an 899GT, currently with original forged alloys, 
http://www.928.org.uk/images/928cswheel.jpg (not my car, but the same 
wheels!).  My car has original spacers on the rear.
I plan to get them refurbed, and was looking for another set of wheels 
to fit.  I have seen a set of 18" wheels and I wondered if they would 
fit.  I wasn't originally going to pod out for an expensive set as I 
was just to going to either borrow some while the original wheels were 
away.

Anyway the "proposed" wheels are:
8 1/2 x 18		tyres 235/40x18
10 x 18		tyres 265/35x18
Offset 61mm.

They are from a Porsche so have the right 5 hole pitch and pattern.  
Would appreciate if anyone can help me.

Thanks

Alan
89GT