Hey guys. I am going to be pulling an Explorer intake off of a 97 5.0 Explorer motor. The intake has EGR, so I was told that the heads may be regular GT40s. If they are not, and are GT40Ps like many suspect, would I be able to use them with my MAC 1 5/8" HTS coated unequal length shorty headers? I could get the heads for 300.00, but I can't afford nor do I want to buy the special FMS headers. I know some guys have said that their long tube MAC headers work, but I want to know if I would have any problems if I tried to swap them in. Also, these heads are coming off a truck that had a bad fire, most of the engine bay was cooked. Is there anything inside a head that a fire could destroy? Finally, would I run into any problems putting these in a speed density car? Thanks for your help guys