Yes the 1810 (B28 spec) if its NAPA uses VC-1810 and autozone uses DV-1810, they should be all in by 8" hg and add up to 16 degrees crank timing @idle on manifold vac, they have a low starting point of about 3" hg. Cant speak for their availability.
For my money the crane points style dist vac adv kit 99601-1 may be a better choice with an adjustable canister. If it is anything like the HEI crane kit you should be able to duplicate the 3-8" hg operation of the B28 along with the 5" hg range. It comes with the limiter plate and springs allowing further tweaking.