Man, those are two great starters, the shoreline is a dutch born sensi sk, raised in Texas and the AG is also a Texas staple, its an ibl mexi.. Great looking plants! Great setup too!
In my professional opinion, I personally would not fuck-up good Texas stock with chemdawg lines. I know its been a long time, but to me, his crimes are unforgivable; fuck his bagseed and fuck him...
Really, if u want to make an IBL, just stablize yur AG/Shore.. once u breed it as f1, if u were to outcross it again, it will be harder to stablize the resulting poly. and it will be super hard, bc you want to cross yur f1 to another f1 poly of an f1 poly... if u want to outcross yur new AG/Shore F1, then choose something that is stable (properly bred by a real breeder) or choose another landrace.
but like i said, the AG/Shore stabilized would be killer. Ag/Shore f1 inbreed to it becomes an f4, then dust yur f4 with yur orginal (p1) male AG. you'll have stable truebreeding in 18-24months. (it may take f5 or more to get stable, that depends on yur selection techniques)