We then used a dead blow mallet to carefully seat the sleeves into the block. Steve also gave us some advice on eventually installing the heads. He stated, "If using other than factory torque-to-yield head fasteners, the fasteners must be retorqued after the first heat-up/cool-down cycle prior to dyno runs. Failure to do this will most certainly result in a blown head gasket. Retorque requires backing off one fastener in the correct sequence then bringing back to torque. Then the next in sequence, and so on, until all are done on both banks." Also keep in mind that a MID-specific Cometic head gaskets must be used and are available from Darton.