Here is my 2 cents worth.
The 1984 Hurst/Olds is option package W40, which was based on the Cutlass
Calais (K47). The Cutlass Calais was the sporty, bucket-seat, center
console, firm ride suspension model.

   W40 Hurst/Olds Package Includes Silver Metallic and Black special paint
scheme with Red and Black accent stripes on Upper Sides and Front-End panel.
Blacked-out Bumpers, Bumper Guards, Headlamp Doors, Tail Lamp and Backup
Lamp Bezels with Black and Bright Grille. Amber Park/Turn Lamp lenses.
Chrome and Silver Super Stock Wheels with Red accent stripe (N83), Black
Front Lower Air Dam. Silver Deck Lid Spoiler, Non-functional Hood Scoop and
Bumper Rub Strip Moldings. Includes all Calais interior features such as
Reclining Bucket Front Seats (AR9), Outside Mirrors (D35) Silver, Sport
Console (D55), Firm Ride and Handling Package (F41) plus Superlift Air Shock
Absorbers, Sustom Sport Steering Wheel (NK3), P215/65R15 Goodyear Eagle GT
Tires (QYH), Instrument Panel Rallye Cluster (U21) and Tungsten Halogen
Headlamps (TT5). 5.0-liter V9 Engine (LV2) with high-performance camshaft
and dual-outlet exhaust system; 4-Speed Automatic Overdrive Transmission
(MX0) with special Hurst "Lightning Rod" shifter and a 3.73 Axle Ratio
(GT4). (Available Only on K47 with Exterior Color 17 Silver Metallic and
Interior Trims 23 Royal Blue Cloth, 25 Maple Red Cloth or 55 Maple Red
Vinyl -- D68 Available C60 and V08 required -- N.A. with B84, B93, C04, N66,
N91, QHW, QJR, QMW, QMX, U35, U46 or Y71)

I hope this helps to clarify things. Hurst-Jim.