Could you tie into the frost slab ratwalls for your lateral resistance? They look long enough to count for your perpendicular wall if they are tied in and matching height.
"You don't know what you don't know, until you don't know it.
F.F. stands for finish floor. Typically in plans, elevations are called out with respect to finish floor elevation, which is set to 0'-0". So grade 6 below FF probably means finished grade to be -0'-6" below finished floor elevation.
"You don't know what you don't know, until you don't know it.
If your slope is 42" over 8', then I show the bottom of the footing being 2'-9" below grade (perpendicular to grade) when finished grade is 36" above the bottom of the footing. If possible, could you just specify 3'-6" minimum (vertically) to make it easy for the guy in the field, either by...
Have you tried using Hilti's 'Profis' software (browser based) for anchor design, or Simpson's 'Anchor Design' software. Both are free, and do a good job automatically interpolating all of the data for you (edge distance, spacing, concrete strength, embedment, anchor type, hole cleaning method...
