Torsion Bars types

Looks like both are 890/891 bars. So, .85" diameter, wheel rate 101 lb/in.

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.85 is 318 car correct? Does that mean someone has changed the torsion bars from my orginal .87 or could it be that it came with .85 from the factory despite being a 340 car? Im pretty sure someone went through the suspension many years ago.