Trying to make everything fit, need advice
I would go with the 15x7s and forget about lowering it
But that's just me
And me
On the street 205s are not enough.
315s out back and the expense you are going to seem to indicate that your engine has some balls. That means it can get you into a lotta trouble really quickly. And to get out of that trouble usually takes a lot of room, cuz first gear is often good to 50 or 60 mph. A lotta room to recover. But if you have brakes, you can shorten the room to something more manageable. The first line of defense in being able to stop, are those two little tiny patches of rubber. After 30 mpg, 205s are not very good at stopping. And if you find yourself in the middle of a turn, skidding sideways, cuz you came in a little hot, those 205s are not gonna save your bacon. I strongly urge you to try to fit 235s at the very least, with 245s fitting with some careful fitment. Ask me how I know these things,lol. I tell you what, 235s are barely adequate on freshly cleaned city streets, and 30 mph speed-limits.And at least 60 series to keep from busting up aluminum wheels,lol.
Or maybe it's just my driving style,lol. But I didn't build my car to put-put; no, I built it to be a charger, and so, I will plow it as often and as hard as I can. And when I break it, I will fix it,and mod it,and strengthen it.
205s were the first thing to go.
Also, with 315s back there, you can take advantage of that, and bias more braking back there, to offset what you don't have or cannot get, in the front. The first thing I did was gut the Combination valve of it's proportioning system to deliver full line pressure to the back. I only run 295s back there, cuz they are cheap to replace, and the brands available don't scream to loudly. With 10x2.5 drums back there,I swapped wheel-cylinders until the rear squatted real nice during straight-ahead braking, but did not lock first. A 4-wheel brake slide, flatting the tires lol,with 235/60-15s up front, is awesome.And with adequate tire patches, They will snap your car back to the line, if you can scrub off just a little speed;in street-work.Whereas 205s will leave you mounted on the curb.
You will have to work your brake-bias out for yourself. I suggest 15/16 wc's to start with.
On the street, I found it was better to sacrifice a little ride-height lowering, to get a little more rubber on the pavement.Sticky 245s were awesome. But they didn't last the summer,lol. Oh yeah, I had to sacrifice a little sheet-metal,too; the front tires were arguing with the area at the bottom front corners of the wheel openings. The tires were winning.
