IMHO RV cams are over-rated as to the added low speed power.
Many mild turbo engines use the original cam.
A turbo with the right controls (size, match, A/R, boost control, adjustable waste gate) can provide additional torque at any RPM, and is far more effective (adding 200 hp is possible, no cam can do that) - but perhaps not more cost effective. Very complex project with much fabrication.
