[SFfiredog]

Mike,
By going strictly with your sonic mapping numbers I wouldn't have a problem using your block for a naturally aspirated, 400 to 450 hp street engine with a good cooling system. The one thing strange about your sonic map is the block seems to have the bores core-shifted the opposite of what is normal.
The major cylinder wall thrust surface on a V-8 engine that rotates clock-wise would be on the inside cylinder wall on the right (passenger) side on on the outer cylinder wall on the left (driver) side. If I'm reading your map correctly, your block has these thrust surfaces reversed. In my opinion, you still have enough cylinder wall for a hot street engine though.
HTH,
--Mike