the A8 build would be its own entity, basically nothing from a LA stroker could be used or, more aptly,
should be used when building a piece like that.
a roller teener with a stroker would be a good starting point for a pretty stout engine combo, but like
@TT5.9mag pointed out a fresh mag with a turbo would be the easy button.
that would easily meet your power goals, live on the street and leave a little money in the coffers for all the suspension work you're going to need, and a trans. definitely a trans.