Yeah, A good came can really wake up an engine. I have 95% of the time used off-the-shelf specific cams (i.e., natural aspirated or nitrous grinds) from Crane and Comps. Helped plenty of other friends install other types of cams and manufactures...
FYI I do have a custom ground 600+ lift cam in my little 5.0 coupe and the developer went to great lengths to get the volumetric efficiency (VE) to perfection... compression, heads (Canfields Stage 2), peak RPM, gears and even altitude I am living in to get the best bang out of her. It's a NA designed cam with a little extra lobe separation for that single shot of N2O. LOL