Mine is still holding strong somehow, and believe me. I drain my rails more than i should (obviously not on purpose).. Just have not had the cash for a lift pump. Or at least not the one I want. Especially running a stock tune I would think youd have no problems. I mean I've got as big of a tune as a stock turbo LLY can handle. Can't say for sure but i know its +2somethin, I was told 225 ~ 250hp. Had a flashscan hooked up driving around one day and I dropped my rail pressure to 11k psi :rof.
So going off my experiences you should be ok, hah.
My lly has been running on the 120 tune for almost 2 years and they didnt go bad but i know the lb7s are infamous for going out so I wouldnt be able to give u a accurate answer for yours but thats the scoop on mine, hope it helps!
Yeah I didnt know the lb7's had a thing for going bad. Either way. My dad ran almost 180k miles with a hypertech 100 horse tune and never once had any problems. Only reason its not still tuned is bc I tried to crank it up but his programmer was fried. It's stock now, and still going strong with 260k miles. You should be ok.