The better question is why did they not put the 440 CID short block under the hemi heads??? There wouldn't be any of this stupid debate about 426 hemi vs 440 6bbl, the hemi would have had the TQ like a 440 6 pack PLUS the top end of the hemi.
All it would be is a 1/16” bigger bore
The extra 14 CID would have been good for at least 15 LBS TQ and another 5 or 10 HP, it would have added a little more throttle response for the roll racing type, as close as people think they are now that would have easily tipped the scales in the flavor of the Hemi.
