That would be the GT40P head. The GT40 heads don't have the relocated plugs.That is s good price. Are the heads pulloffs from an Explorer or were they purchased new. If using them for performance, use aftermarket springs, retainers, locks and have the heads machined for decent valve stem seals. I had a set of these on my 5.0 for a awhile. I had to use short spark plugs and machined one of my sparkplug sockets so that I could get at it. These heads are the first sbf head to relocate the sparkplug location which can cause problems depending on the headers you are using. I had my set pocket ported with a performance 5 angle valvejob and they out performed a stock set of GT40-Y heads which I quickly replaced with AFR 165s. The P head is a deal at that price.