DV is going with the pistons to up Cr this should help when and if they add the bigger heads. DV dnt know dick about mopar said as much and I suppose f you have flow benches and people willing to grind and polish heads as a "charity donation" you can do just about anythng...look what the Chrysker engineers did when they took the 273 ddesign and made it into the 340 hell they recast the whole block and heads....:)