Stock motor???
 

I was wondering how much 1. N2O it will hold and 2. how much boost it will hold (turbo intercooled)

8 lbs usually, maybe 10 with a good tune and proper fuel system on pump gas. I've seen as much as 15 lbs on race gas.

Nitrous, I've seen dual systems making as much as a 225 shot.

I wouldn't go any higher than a 150hp shot of N20. And it should be able to handle 10-15 pounds of boost.

Inter-cooled turbo? Your broke. Is this gonna be like that 408 that was gonna go in your 2.3?;)