2 18" spiders wanted or will they fit!?

[chriswindows]

Just changed my griff for a cerbera for the extra seat/s!
As part of the part chop I got some Tuscan 18" spiders and a child seat and bracket.
I've since read up and been advised by Paul at PPC Melton where it's gone for a service that I need 4 front Tuscan wheels with the offset 42 so they fit.
I'm going to get some tyres fitted before I refurb them but has anyone had them fit fine on the rear with the 33 offset, or has anyone had the rears machined down or got another solution?
I've had my tape and straight edge out and there is 9mm difference between them, i know that might be obvious but I needed to see it for myself! I'm interested to see how much difference they stick out or rub or not for 9mm
So if all goes T**s up I will be needing some fronts for my rears and will have a pair of Tuscan rears available!
HELP!
Cheers

[tvrgreg]

Yep you need to run front 18" spiders on rear of cerbera or they will catch/rub on inner arch unless you raise ride height and stiffen shocks. have seen people cutout and trim rear inner arches but just easyer to fit front spiders.

[mk1fan]

I think there is one front wheel on evilbay atm.

[mk1fan]

Or get the 16-inch wheels in the classifieds and go for the Chim/Grief look of small front large rears

[chriswindows]

Bugger! Never straight forward is it!
Fleecebay it is then!