One thing that's not mentioned is whether the sub frame will changed or not. If something like a Camaro subframe is done I'm not sure if the sitting height of the engine changes.
I'm saying this also for if the original steering box gets in the way for the exhaust, I see some with small blocks having to work with the steering box sometimes.
Other than that there is plenty of side space. The only issue is between the firewall and radiator. I left about an inch between the valve covers and firewall, this, even with the short water pump, didn't leave much space for a mechanical fan. The optimum way for me was a dual electric fan, the water pump pulley fit between the two electric fan motors.
This picture gives an idea of the front fit.
And a front view, mine does have a Camaro front on it.
As I mentioned, I'm not sure how it settles in with a stock frame, someone else my have that answer.