We have confirmation thanks to the guys on the classicOldsmobile forum. The correct casting number is 5460346 with letter code "DW". NOW, does anyone know of a source?
If you google the part number and ‘gm’ you get a bunch of them from the Corvette world, some unstamped, some stamped with other codes. Presuming the part is the same, could you get one stamped? (Or sanded first, then stamped?) Patrick
Yes, that is true, but I'm not trusting my GS to Chinese reproductions. Rather find an original and have it sleeved/rebuilt by a reputable company.
There’s a few used ones, too; as long as the stamp doesn’t alter it somehow, get one of them and have it rebuilt. I presume you’re doing that with the calipers, right? (In a former life I was a parts guy, and it was difficult then to get rebuilt calipers and when AA1 did ship they were iffy quality, so I started recommending guys started having their old stuff redone instead of taking the risk). Same with carburetors. Patrick
I’m pretty sure 11”. GM usually used the smaller diaphram on four wheel disc cars (and it was a dual diaphram-twice as thick). Only car I’ve owned with a 9” was a ‘79 T/A with four wheel discs. You can do the conversion yourself with parts store components and either but used spindles or trim yours down. Buy rotors, pads, hoses, calipers and the master for a ‘69 Skylark with front discs. You’ll need spindles (or modified drum spindles) and a few miscellaneous parts but half the kits out there are just ‘69-72 parts with the little stuff added. Patrick
