I am looking for information on rims that would fit on my 1977 280Z 2+2 that i could put on without having to make any modifications to my car. Any information would be greatly appreciated.

Barbara, There's lot's of threads here on wheel fittment. If you use the search feature, you'll be a Z wheel fittment guru in no time. Here's the condensed version.

Motorsports Auto sells quite a few wheel sets for your Z. Might I suggest the 15X7 Konig "Rewinds" they have on their site. A popular style for the lowest price out there.

For used wheels, sure to fit your Z try Eric's zparts.com

There's a few more out there.