Here is an original plastic timing tab removed from a 301 Firebird engine. Excellent condition no cracks or nicks. Fits 1977-81 Pontiac 301.
Part # GM547157 also marked GM6058M FDC
$15.00 shipped is half the price of this one on ebay.
http://cgi.ebay.com/ebaymotors/77-81...4506.m20.l1116
Thanks, John