Mill decisions

Also the smallblock mopar has 4 inherent problems and none can be fixed cheaply. One the bottom end strength is not great for making a ton of power. 2 bolt mains, thin webbing and non solid pain rails. The second is cylinder wall thickness which again is a big limiter on how much power you can make. Most I've sonic tested have .275 for the thickest and 2.30 below for the normal before any bore is done. Third is the 4 bolts per cylinder which stinks if your plan is alot of N20 or boost. 4 bolts is just not enough to hold the gasket at high cylinder pressure levels. The last is the 59 degree tappet angles. These do not lend themselves to valve train stability in high rpm situations.

Even with all their problems they are very good blocks but also ALL these problems can be fixed with an R3 block.