Wheel adapters??

[Zrated383]

I am probably getting a 1991 GT and I would like to put new Bullit rims on it. I was searching for the rims and I found these...

Has anybody ever tried these? Any opinions or suggestions...?

What is needed and approximate cost to do a 5 lug conversion the "real" way (5 lug axles, etc)?

 

[PRO50SC]

You can go a couple of different ways. New stuff, used, whatever fits your budget. Check out this site. It will help you with what you need.
I wouldn't go with those adapters. Too thick, throw the wheel too far outward.
5 lug conversion

Here's a kit from 50 resto. Includes everything. Not recommended fir use with the bullits though.
50 resto
Hope this help out.