try a good paint and auto body supply they sell universal trim fastener pieces that snap off at the correct length or width and fasten the stainless through the orig body holes, the new tape adhesives also do a great job.
Kanter or ames have them. both will send you a free catalog. <a href="http://www.kanter.com/index.html" target="_blank">http://www.kanter.com/index.html</a>
<a href="http://www.amesperf.com/" target="_blank">http://www.amesperf.com/</a> both are for old pontiac's. I have a 54 2dr ht I am doing