Snow ball effect!!

Basically you'd want to bypass the amp gauge with the higher load on it. Problematic for our old cars. Also upgrade to a higher amp alternator. I run a 90amp with my fan, stereo (no amp), and h4 headlights. Factory charging systems barely got the job done with no aftermarket parts. adding a stereo and electric fan just buries it that much more imo..

goodysgotacuda.com/HowTo.html for denso alt stuff

edit- sorry just noticed you bypassed it already. and no a different stall is not intended to keep rpm up. you can just adjust it from the carb, but thats a band-aid fix..