Based on your last pics, I think your springs look just fine. Not all that much different from new considering the extra 150lbs. When new, the springs look pretty much flat anyway, and it doesn't look like they're frowning to me, so I'd say you should be good for an AAL.
Angles and such can be a little deceptive in that manor though, so its really going to have to be up to you. If they have a negative arc, replace them. If positive arc to near flat, you're good.
If going by the FSM, the height of the center of the axle and the height of the center of the front leaf pin to the front leaf spring pin should be about 1.5" for most vehicles (assuming no lift). The specs can be found http://www.ncttora.com/fsm/2003/Repa.../sa/serdat.pdf
(dont worry too much about tire size as you're just estimating anyway). See http://www.ncttora.com/fsm/2003/Repa...4wdpr/insp.pdf
to see where to measure. (same location on 2wd and 4wd for this measurement).
Of course this should be done with an empty bed, so take that into account, but as long as the leaf bolt is higher than the axle by half the factory height, I wouldn't worry about it.