just got a 67 stang sugestions?

Well, the roll cage you will probably have to cut out.

As for the best online source... there's a few good ones out there. Try doing a couple of searches. I personally like CJ Pony Parts.

If you are buying a bunch of parts, you'll probably end up ordering from a couple of different sources due to availability and pricing.
 
I found a wonderful source for my 68, is called National Parts Depot (NPD) go to their webiste and order a catalog for 64-73 mustangs. its well worth it let me tell you.