Looking for extended studs for my 67 cutlass. All the part stores list two part #s for the front drum assembly. One part is for a 1 piece drum assembly and the other is for a two piece drum assembly.

did these cars come with a 1 piece drum assembly in the front? Does that mean the studs would be a part of the drum? I pulled the drum off the front and the hub and studs are not part of the cast iron drum. Does this mean it’s safe to say I have two piece drum on the front?

all of the rear wheels for this year are listed as two piece drums, so hoping I can buy the same extended studs for all 4 wheels. (7x16 with .480 knurl)

 

Every single A-body front brake drum is "two piece" - the drum and hub are separate parts. On Oldsmobiles, the splines on the studs are longer and press into the drum in addition to the hub, such that the two cannot be separated unless you press out all the studs first. Chevies used studs with shorter splines that only pressed into the hub. The drum slides over them and can be removed without removing the hub. I ASSUME they are calling the former "one piece" and the latter "two piece".