tires, will they fit my? Options

[schmooot]

No this isnt a "will these rims will fit my car" thread....I've researched those ones already. My car is a 94 GT4

I need some rubber to put on my stock 16" rims just to make the car mobile (its on jack stands right now and needs to move).....I won't really be driving it much except to get it to and from shops and storing it for the winter, I found some free tires that I can mount on my rims but I would like to know if they will fit in the wheel wells before I waste time mounting them.

Stock tire size is 215-50-16 = 24.46" diameter
Tires on when I bought it 205-55-16 = 24.87" diameter


cheapo tires I got for free:
215-60-16 = 26.15" diameter
215-65-16 = 27.00" diameter


Mainly I want to know if running different tire sizes front to back like that will damage my awd system, second is will these monsters fit in the wheel wells and clear the lower strut mount.

ASAP before I get them mounted please!

[schmooot]

ok so I did a little math, I have 1.25" of clearance between the top of the wheels on there now and the bottom of the strut mount, the radius of the wheels on right now is 12.435", plus the clearance would give me an absolute max radius of 13.685" in order to clear the strut mount right?

The tires I want to fit have a radius of 13.5", theoretically that should give me a clearance of 0.185" between the top of the tire and the bottom of the strut mount. Did I do the math right?