I have a couple questions and I'm in search of a cpl parts

As far as rims go without flaring the fenders and quarters or moving the leaf springs inward then 15 are not going to work
The chrome pieces for the cover when the top is down are not being reproduced as far as I'm aware of. So if you don't need to touch them leave them alone or do what you can with them in place.
Are you sure your mom isn't allowing you to think she is oblivious to what's going on? After all she's getting her car done for her in the end. NEVER underestimate a women even Mom's.