...and those were offered in 1969 only. The 1970 Fast Pack kits (GTO and Grand Prix) were all styrene including the Hot Wheels style tires. I have a GTO, it is molded in red. I don't know what color the Grand Prix was molded in.
There were two 1970 GTO tools; parts like the rear bumper and glass are marked #1 or #2 on the back side or another inconspicuous place. There were 1970 GTO promos, there was a "contest promo" in red only with license plate detail on the rear bumper, an annual kit (hardtop only, but I believe a convertible was announced), and a funny car. One tool got updated to 1971 trim, the other got reworked into the dirt track car. Its interior turned up later in the Ertl '70 GTO which was backdated from the '72 (and later changed back to '72 spec).
--Mark