72 steel or cast crank?

1972 - The 340 four-barrel dropped to 240 horsepower:
◦Compression dropped to 8.5:1; the compression height of the piston via wrist pin location changed by 0.10”
◦The crankshaft was switched from forged to cast somewhere in the production cycle, believed to be in early April 1972; a milder camshaft was used
From Allpar.com