Ok so I just ordered a new set of gt40 heads for my 87 mustang. Now im looking at Pistons. Are the stock ones good or nah? Im looking get a supercharger as well probaly between 5-8psi. want to make sure i have pistons that will hold up. Also what about the rods attaching to the pistons, someone told me that the stock piston rods are fine but what to get a second opinion. thanks..