OP might want look at Sprint car stuff for ideas. 410" combos seem pretty standard but I believe they are A8 based which is a totally different animal than a 340 resto block. The A8 is an aluminum dry sump block. Big $$$$$ if you can even find one, like $1X,***+.
Sprint Car engine book.
2015 Bang Shift A8 article.
Have not heard from Mr. 79powerwagon these last few posts. Maybe he is re-thinking this whole deal? Be curious to know what he has gleaned from this thread. It's a unique application for sure.
