Re: aluminum drums
BLAZER S10/JIMMY S15 83-84 aluminum
BONNEVILLE 80-81 9-1/2" dia, aluminum
BONNEVILLE 82-85 aluminum
CAMARO 82-92 drum, aluminum
CAPRICE 86-89 9-1/2" dia, aluminum
CATALINA 80-81 9-1/2" dia, aluminum
CENTURY 78-81 aluminum
CUSTOM CRUISER 85 9-1/2" dia, aluminum
CUTLASS 78-82 aluminum
EIGHTY EIGHT 80-85 9-1/2" dia, aluminum
ELECTRA 85 SW, 9-1/2" dia, aluminum
FIREBIRD 82-92 drum, aluminum
GRAND PRIX 78-85 aluminum
LE MANS 78-81 aluminum
LESABRE 80 Sdn, drum, 9-1/2" dia, aluminum
LESABRE 81-84 Sdn, 9-1/2" dia, aluminum
LESABRE 85 9-1/2" dia, aluminum
MALIBU 78-81 aluminum
MONTE CARLO 78-81 aluminum
PARISIENNE 80-81 9-1/2" dia, aluminum
PARISIENNE 86 9-1/2" dia, aluminum
REGAL 78-87 aluminum
RIVIERA 81-85 drum, drum only, aluminum
S10/S15/SONOMA 82-84 aluminum
SPRINT (GMC) 78-81 aluminum
These are all 9 1/2x2. Same as the Sy/Ty...However, I don't think Sy drums will interchange with Ty drums due to backing plate interference. At least that's what my Hollander says.