Big horsepower 318 builds

LA - benefits
High nickel alloy [pre-1977]
High cam centerline height of 6.125"- Much higher than other small blocks and also higher than
the Mopar big blocks including the Hemi 426
Stock 6.123 inch rods the teen offers a rod ratio the competition would die for [1.85:1]
Valves are inclined at a advantageous 18 degree angle
Higher cam centerline clears long strokes easily and therefore allows more displacement
Chrysler engineers made a Master piece.
Yes they did. So why did the cancel it? Was it such a good engine that Chrysler was not making any "after warranty" service money?