hey all i recently encountered an oil leak to which i think is the intake or head gasket so i decided to do both. i called the typical parts store and they gave me prices for the intake valley pan gasket. $67 canadian. like any gearhead i decided to call around for prices and called a performance place and they quoated me $29 for feltpro (sp?) gasket as in the gasket for the drivers side and passenger side of the intake plus the two rubber end gaskets. when i told them about the valley pan gasket i got a price for it suprized me that they said they have never heard of the valley pan gasket for the 400m before.???? can you use either or, or is there a specific reason the 400m requires a valley pan gasket?