That Lunati cam is pretty small in my opinion, but I'm a drag racer, on or off the track
I built a similar 1970 Challenger 440 (452 C.I.)6 pack 4 speed Dana 60 with 3:54 gear ratio clone car similar to yours back in the late 1990s. I used the Comp Cams Magnum 280H grind in that motor with Hooker two inch headers and a 2.5 inch exhaust system and the stock 6 pak 1970 cast iron intake and carbs, that combination ran okay to good
My current pump gas street car (1966 Dodge coronet Deluxe two door sedan, NP833 OD trans and a Dana 60 with 3.54 gears, 275x60x15 tires) has a similar motor with the 3.91 stroke and a Comp Cams XE295HL cam in it, that motor was in my old pump gas Duster with a aluminum six pack intake and a set of modified stock type vacuum 440 six pak carbs., stock port Eddy RPM heads a bigger exhaust system on it and it ran very well, 10.90 in the 1/4 mile corked up with the air cleaner on running 91 octane Oregon non ethanol pump swill
My message is the 4 speed motor will tolerate and like a bigger cam than your looking at, in my opinion