I own a '74 camaro and i just bought new rims. i'm going up for 14" to 15" rims. What wheels would work the best for these, without any clearance problems?

Try these...
http://www.nastyz28.com/ubb/Forum10/HTML/004123.html
or
http://www.nastyz28.com/ubb/Forum10/HTML/004405.html
just do a search in Suspension, Brake & Wheel Topics under any date, you'll find all kinds of stuff.