Rear shock difference

Rear shock difference, A body, (Drag racing shocks) for an automatic vs 4 speed? I'm looking at some MOPAR drag racing shocks for sale by another member that was posted for an A-body "automatic." Some places list the shock by part number for an automatic and another site, by part number doesn't mention automatic or 4 speed. Bottom line...is there a difference? 1965 Barracuda 4 speed.
Norm