I now have a ATI but used to run a fisher, Some run a fluid dampener. But bottom Line is V8 dampeners with a single pulley mounted to the face for my Alt. That is all I have on mine.
Larry/Twisted6 [oooooo] Adding CFM adds boost God doesn't like ugly.
BHJ is making me a SFI damper for my 292 with serpentine pulley, setup for dry sump oil pump and 3" blower pulley. I have to go with big block oil seal. I'm also just running alt. I have electric P/S and A/C
ATI makes a balancer specifically for the Chevrolet inline sixes (250/292) which also fits the 153/181 four cylinder engines. These are "tuneable" and can be tailored to your specific engine if you have special circumstances and can supply them with the information to do so.
Never use a minor caliber bullet on a major caliber adversary