Not A bodies.
They did go to the large upper ball joints, but they kept the SBP.
‘73+ A-bodies were BBP if they were disk/drum, and SBP if they were drum/drum. All the V8’s 73+ were disk/drum and therefore BBP.
Yup, that’s not how those come apart.
The 10” measurement doesn’t actually tell us much, the 10” A-body front drums were small bolt pattern (SBP). There are two different shoe widths, your ‘74 should have the wider front shoes that went with the redesigned drums with the large ball joint spindle.
