exg071

I am told I have the windsor heads for the head swap to my 98 gt how do I know how many bolts are there I count 12 on the top and 4 on the side of the cam gear. In addition will any pi intake or bullit intake fit my part number for the heads and will I need new valve covers and how many bolt pattern of valve covers do I go with to complete the pi head swap. The part number for the heads is rfxl3e6090c20d PI. I bought these according to the previous owner stating they came off a 2000 saleen but the numbers match a 5.4 pickup how does that work did I get my eyes poked any advice helps.