early v8 explorers had the regular gt40 heads. they were later switched to the gt40p. You can tell by looking on the end of the head. Regular GT40's had 3 bars, P's had 4 bars. The P's also say gtp by the lower head bolt on one end. I personally would spend the extra bucks to get a set of twisted wedge heads. they flow much better. check corral.net there is usually some floatin around on there
Yeah im just looking for something a lil better thank stock right now. I plan on building a motor this winter. Possibly a 331 so the gt40s that came on teh cobra should be good for this summer.