Fitment question

Before I go too far, if you're planning brake upgrades you may want to wait on wheels until you've either done the upgrades or at least decided for sure on what brakes you'll be upgrading to. The reason for that is that most aftermarket brake kits for the front and rear change the track width. Some more than others. The other thing is that in the front different brake kits also have different hub bore requirements. A lot of the wilwood kits now require a 3.050" hub bore, which is huge, so not every wheel choice will fit it without modification. You'll definitely want to know what the hub bore has to be before you order wheels, especially if you need a hub bore larger than 73mm (2.87") which is a fairly standard aftermarket size.

Now, having said that, let's take a look at the rims you're talking about. In the front the 17x7's with 38mm of offset should work. That's a 5.5" backspace, and that is less than the 5.6-5.7" backspace where you start to get outer tie rod interference with some rims. The problem I see is what tires to run. A 245/45/17 isn't supposed to be mounted on anything narrower than a 17x7.5, 235/45/17's have the same rim width problem, and a 235/50/17 is 26.3" tall, which is kinda tall. A 225/50/17 would work, but that's not a ton of tire considering you can probably run a 255/45/17 with the right rim and backspace. On the bright side, you wouldn't have to worry about different brakes increasing the track width some because you'd have plenty of room for that.

In the back an 18x8.5" +25 works out to a 5.7" backspace, which is too much for a stock width A body 8 3/4 and stock spring locations even with BBP axles. You need to end up around 5" to 5.25" of backspace, if you did that you could run 255/40/18's. If you went to an 18x9 or 18x10 you could run 275/35/18's, especially if the quarters have been rolled.