That’s basically going to want something like a really tight 9.5”.

Flash should end up in the low-4000’s.

It’s likely going to need to idle at around 1000-1100 in gear....... maybe even slightly higher.
It will be highly dependent on the timing curve and carb set-up.

In my mind that’s really more of a mild bracket race/hot street strip cam........as opposed to a mild-ish mostly street cam.
Looks like it’s from the UD masters. Same grind I ran in my 448, but on a 108.
Measures closer to 259@.050 with the Mopar sized base circle and .800 lifter wheels.
My 448 was reasonably docile with it...... but I was running 4.56’s and a 5300 converter, with open headers.

I’d expect the idling in gear vacuum to end up under 12”.