ok rather than laugh and make jokes ill give u my info i have learnt... guys give him a break, before your toyota days i doubt you knew this either so stop being dickhead know-it-all gurus.
i have 15 x 6.5 inch r31 skyline wheels on my car, i run 8mm spacers or the wheels rub on the strut, buy yourself some 8mm spacers and see how much gap ypu have, my guards have been flared also, but i still have heaps of room anyways. tyres are 195/60/r15's, anything bigger and your wasting your time.
on my rear i have same rims with 205/65/r15's and they fit with no spacers, the tyres are ghey but might as well thrash them before putting 195s on.
result, buy yourself some 8mm spacers mate and 195 60 tyres and you should be fine, my car is lowered with rolled guards too, but i reckon you should be fine without it
good luck, Dave