408 6pack setup

The intake is rated @ 2500 - 6500 rpm. Exceeding 6500 is possible with port work.
The valve train must be up to snuff and stable for what ever rpm you plan on turning. More cam equals more spring.

The extra stroke lowers peak power and add's torque. So a what ever cam you use will have to be reduced in its operating rpm range by a few hundred rpm's.

That cam you list above is not so much as to big for the engine but is it to big for the rest of the car? The (if so equipped) converter stall speed and gear ratio/tire size of the car combined with its weight must be part of the over all combination to work well.

Some of the missing information is compression ratio and what heads and state of condition there in, as well as what they flow. At your level and what I understand is the direction of your build, a set of Hughes engines (.com) big mouth CNC ported heads is about as an excellent match with (IMO) a competition ported 6 pack intake on top of it all.

(FWIW, I just sent my small block 6 pack intake out 2 days ago for there fully comp porting work. The cam to be used along with it is also a Lunati. Solid roller, (40200733) 60433, 249/255 - .585/.600 - 110/106 - .016 lash, 1.6 rockers. 3000 - 7000 rpm range, which dips slightly on a 4" arm.

The rest is; '73 Cuda, 4spd, 4.10, Hooker Super Comps. Fiberglass AAR hood.