Daily Driver Engine 318 vs 360, what one?

I am just asking here, not trying to be a smartass. First, you throw out "450 HP". Are you familiar with what a car feels like with a TRUE 425 HP? That much power in a properly prepared A body can see some 10 second ETs. Secondly, you are correct. A 318 can be made to produce that power, but streetability will suffer, whether with a roller block or not. Lastly, if you think you would be happy with around 350 HP, you could build a 318 that easily eclipsed that mark AND gets decent mileage too. Just some points to ponder, cause gas AIN'T gettin cheaper.