Front tire dilemma

Yes your rear shackle angle is a lil shallow, but if they don't flip on you, I'd be tempted to leave them. The springs will sag a lil in the next few months.
Yes the front fender struts may have to be removed and the lips rolled.I might bet money on it,lol. We do this with a wooden dowel that will grip the tire, and then have a helper roll the car back and forth while you try to control the dowel as it rolls between the tire and the lip. Easy does it, and a lil bit at a time. It's a one-way trip for the fender so easy does it. Some guys use a baseball bat.
Before driving it,give her full lock steering and back her up. When you hit the brakes, the tire will move towards the front bumper and usually smashes into the fender and tries to crumple it upwards as it catches on the tire-treads. The only cure is to cut a section off the fender for clearance. Here you need to be generous cuz the strutrod has a large range of motion, and if you crumple your fender, you are not gonna be happy. Keep in mind that as the suspension cycles up and down, this clearance you are gonna create, changes. So be careful and generous.
If you do this in the forward direction, the wheel will move rearwards, and give you false security, but at least it won't crumple the fender.
After your rear tires wear out, consider taller tires on 15s back there on rims with more bs. Big and littles have always been common on our performance A-bodies. If you worry about carrying 2 spares,yur not dedicated or adventurous enough,lol.. Instead,carry a plug repair kit and a pump. Besides in my entire 50 years of driving, I think I have been stranded just twice by flats, and both times within 4 miles of home, God is good.