Personaly I am using 10" drums for 3 Reasons.
1) Got em free.
B) The rear is less likly to lock up and getting a balance front to rear is probably going to be easier for the IVA.
3) Having owned many sierras, I can assure you that the handbrake mechanism on the disk brakes is prone to siezing even on cars with fairly regular use, on a lightly used kit the may be useless.
IV) The disk setup on sierras without ABS uses a larger rare master cylinder that provides more fluid movement than the drum brake one.
TT
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