Big block or Small block?

[Mr. B]

I'm about to move forward with an engine for my Camaro. I really like big block torque, but a lot of todays small blocks are putting out nice solid power too. I particularly like the Smeding 540 and the Smeding 427. If you have a small block with 500ft-lb of torque or more across the power band, would that be salty enough in a first gen? I'm building a pro touring car, and want to track it from time to time. Is the lighter weight of a small block that much of a difference?

Any real world input would be appreciated.