the following must be true...................it's from the internet
late model 12.7:1 quick ratio gearbox
ID markings YA ,WS and HX
Line Thread Size : M18x1.5 and M16x1.5
Number of Mounting Holes : 3 ( missing leg H-pattern )
Input Shaft Diameter : 3/4-inch
Output Shaft Diameter : 1 1/4-inch
Number of Turns Lock to Lock :2 1/2 - 3
1984-88 Monte Carlo/Malibu with Z65 suspension
1983-88 Malibu,El Camino
1982-92 Camaro except FE1 soft ride suspension
1984-87 Regal withFE2 or FE3 sport suspension
1983-84
Hurst Olds
1985-87 Cutlass with 5.0 ( VIN code 9 )
1982-85 Trans Am
1986-92 Firebird except FE1 suspension
1986-87 Grand Prix with FE2 touring or F41 heavy duty suspension
or go to Rockauto and search under T-TYPE /
Grand National
click & buy