it was destroked when they cut for chevy 2.2 rods.i have chevy grp 5100 series 6.800 rods.srp 458 pistons.55 overbore.ported bigger valve closed chamber 516 heads.comes out to 440ci short stroke big bore high rpm beast its pretty cool actually and has about 11.1-12.1 compression.cam with mopar 590 solid cam and lifters.tm7 intake.there was a 404 hemi for nascar some time ago,they destroked a 426 crank to 3.558 i think it was kickin but.machinest said whoever had this wanted it this way everything works together.should be a screamer.