Sorry, I forgot to include the link to that trashed white 70 T/A. Here it is:
http://cgi.ebay.com/ebaymotors/Pontiac-T...A1%7C240%3A1318
Here is a photo of a 1970 to 1972 flat top radiator support. (The four white spots are pieces of masking tape to protect the paint during adjustment):
Here is a photo of the 73 and up support. Note how the 73 and up T/As and Formulas have the large steel fender to radiator support braces required for new 5mph crash worthiness standards that started in 1973. This required a new radiator support that had two large deep channels in the top of the rad support to hold the two steel bars. Also the tops of the inner fender flanges have a elevated flange with two bolt holes to mount the steel bars too, as noted by the red arrows. This was also the replacement style radiator support sold by GM after 1973.
And note how the drivers side fender on the trashy white 70 T/A that is listed as "95% all original" has the 73 and up elevated mounting points making it a later replacement fender and not the original as he says it is:
Compare the trashy white fender to this original 1970 to 1972 fender. It is flat area with no bolt holes and a flat top radiator support.