The discussion about horsepower and torque might be interesting and might be fruitless, and it might be of more interest in the Hi-Po forum,
However, one question asked above is closer to being a matter of physics (I think) and it has to do with standard equipment/parts: what might be the difference in compression that would result from placing a stock "848" 235 head on a stock 58-62 261 block?
Thanks,