Cam Specs.....where will the power be?

You would have to use a fuel pump eccentric with the long snout in place of the Magnum bolt and washer setup, but the 1.6:1 magnum rockers would make .517 lift from the .323 lobe lift (.485 with 1.5:1 rockers). The 408 cubic inch displacement would drop about 300 rpm off the usable range, or close to 900 to 5200 rpm. This would make a wonderful towing package with plenty of extra "grunt and go".
Voodoo Hydraulic Roller Cam - Chrysler 273-360 (W/ Long Snout) 264/270
They appear to have it in stock, but I would call first.
Lunati Engine Camshaft 20200715; Voodoo 1200 to 5200 .485" .485" Retrofit Hydraulic Roller for Chrysler 273-360 "LA" Mopar