Look....the common consensus here is to build the 351. Even n/a a 393 will meet your power goals.
Once you get this thing making decent power n/a, with a decent set of heads, put your blower on it. You built the one intake, build another. ( I know a guy that has to build his own intakes, and he recently built a whole different system despite the fact that he a really good looking, perfectly working piece already).
The "drop in another stock block 5.0, transfer your stuff over, and run it till it blows" is flawed...Do you really want to have to do this over again?
A 351 has a wider deck. There will be more room for the injector rails, and the blower itself It's gonna make more torque even at n/a. you won't have to blow 11-12 psi into it to get to the 5.0 block killing 500ft lbs. You'l have your looks, you'll have your sound. And, if you found a stock bore 69 casting, what's stopping you?