buy some 20mm ones for the front mock them for the back and then if want more you can buy 25mm most companies are nex day delivery and that anyways so qont take long
 
yeah I was thinking 20 just for trial fitment, could always trial the front adators on the rear anyway and see how much they stick out
 
I ran some before and i had 15mm front and rear but you could go 20mm on rear would look better. Also had 195/40 on both rims with some nice stretch on the 9 inch rears. I have photos somewhere il try to find.
 
thank you thats helpful, ill be purchasing 195/40 all round then, and 20mm spacers :), pics would be perfect!
 
My tire fitter gonna attempt a 215 35 19 on a 9j and 225 35 19 on 10j that gonna be fun to watch.