Upside Down Block Fill?! Big moves happening on our Ford 300 as we are trying something we’re NEVER done or seen done before(DM us a video if we’re wrong)…filling the deck surface of the block with Moroso Performance Products, Inc. block filler! In theory, this will help support the top of the cylinder where most of the pressure from combustion occurs, but there’s only one way to see if it works, trying it! Comment below if you think it will work and hit the follow button to see if you’re right!