Mate, to be perfectly honest there is the RIGHT way to do this, and no other. The RIGHT way is to use the correct wheels and tyres. If you can't afford to do it that way, don't do it. Not everyone can afford to do everything they want - life gets in the way. Just enjoy what you have dude.

You seem obsessed with having the wheels pushed right out to the edge of the guards, but have you considered how these relatively skinny little wheels will look from the back of the vehicle? To fill out the rear guards properly, you need 315's on the right rim width.

Just take some time mate. Save your bucks as best you can, and wait till you can do the job right. Otherwise it's just going to look half-arsed and ghetto-fab.

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Cheers,

Anthony