Hey I'm really kicking myself for spending so much on my SBC as what I really want now is an LS and I haven't even installed my SBC yet. If you want a nice strong SBC because you can easily have 500hp with a SBC, I will gladly sell you mine as I haven't yet purchased all the stuff I need yet so I'm happy to go LS at this point.
I'm sure there are plenty of good speed shops that can build a strong small block for you but to be honest I'm $10K into building the one I have.