Looks like a lot of Salesman B@ll S%!t statements in there....
What does the fender tag and buildsheet day?
No such thing as a "Hemi core support". Sometimes the radiator used in some HD cooling cars including A/C cars, share the same radiator part number that Hemi cars happen to use. The larger HD radiator opening was for A/C cars and some performance axle cars, and towing packages.
.92 was the hemi sized torsion bars. HD suspension cars got the .90 torsion bars and front sway bar, and sometimes larger drum brakes. Larger drums came on std on performance Road Runners, Super Bee, R/T etc. The 1970 AAR and T/A cars got .92" hemi sized torsion bars.
Possible police suspension or something fleet may have had bigger torsion bars or leafs. What does the fender tag or buildsheet say? Torsions bar and leaf springs can often get changed in 55+ years.