Rocky, nice looking 'chovy. The color rivals Big Hammer. Anyway I have two suggestions...firstly, when I'm pouring saltwater baits, I never worry as to softness of the lure like i do with freshwater baits. IMHO, saltwater species are generally more aggressive and you know if they want the bait, softer plastic will not encourage strikes and as some guys said, they are very fragile. That said try one of these suggestions:
1-Go with a little hardener
2- Go with Calhouns Tube plastic mixed with regular soft pour, it is a stiffer, more durable plastic. It will give the bait more body but being mixed with the soft will prevent it from being hard as a rock.
As long as you do not over do it, the tail should be fine as far as action goes. Hope this helps. I pour some 3 and 4" shad bodies and especially shrimp bodies for snook, trout, reds etc here in Florida and the mix has done well for the durability of the baits. I really don't use salt in my saltwater pours.