Part Number : 35571. MOROSO Engine Block Filler. One "Gallon" Container. Just fill with water, mix and pour into block before machining. Has expansion rate very similar to cast-iron.
In order to reinforce my big block after sleeves installation I have used the Moroso engine block filler. Easy to implement, 1 gallon quantity per side is perfect for a small block but you will need 3 bottles to fill a big block until the water inlet level