With what it costs to fill a block with parts save your money and buy a good block. If the block fails on the good side you have a pile of junk on the bad side you run through your own oil and destroy the car and maybe lose your life. A stock block was designed for how many horsepower? 400HP? So you take a stock block bore it, make it weaker then stuff parts in it to make 700HP to 800HP, so why do they crack, just stop and think about it? I was racing before mopars had aftermarket blocks, I filled blocks, billet caps, aluminum caps, main girdles, etc. I never lost an engine, but three seasons was the best I got. When I took them apart to freshen, cracks, cylinders were barrel shaped, main caps loose in the saddles, had to throw away and start over. A good aftermarket block is the single best investment you can make if you like racing mopars.