It depends on which shifter you have, some of the OEM Hurst shifters for production Mopars came with steel bushings and some didn't Either way there should be very little slop, not a bunch
A lot of the over the counter after market Hurst shifters for Mopars came with plastic bushing so maybe yours are missing Measure the hole in the shifter arms on the shifter and the ends of the pins of the linkage arms that slide into the arms and post them on here, maybe we can figure out what you need to tighten them up