MeMike, I think it's time.......

Small Block said

Pump gas may be a little far fetched. What ever it takes. Nitros? OK. 110 octane? OK. Tell us what we need. Wicked six. You look like you may have a clue. Tune us up. Is the 100 over realistic? It will be a track only car but needs to be dependable. BH block? What #'s are we looking for? and where?

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I wouldn't take it .100 over , the thicker cylinder walls will stay rounder under pressure , go as big as you need to help the flow characteristics of the heads and not much more , stroke it as much as possible to add cubes .

E85 would be a good fuel choice if it's easy to get , but you may want to purchase something like ROCKET Brand E85 , i hear the stuff in the pump is anything but consistent . E85 will allow you to run more compression , something the the 'hood of 12.5 would be perfect for E85