Untouched Mopar X block (Reduced)

dustinmoran91 said
A 318 x block? Whats the purpose of this? Can it be bored out to 340 or larger size?

i have seen x blocks bored out to 4.125''. my bore on my x block is at 4.100''.

with my 4.25'' stroke crank, i'm at 450''.

they are race blocks.