Can I convert my internally balanced Big Block Chevy Fluidampr, into an externally balanced Chevy Big Block Fluidampr?

As there was a design change, you must first determine which type of bolts you have mounting the adapter hub to damper ring (see picture below). If the bolts are the new style, socket head cap screw, then you will need to replace your existing adapter hub with an external balance adapter hub, part # 100002. If the bolts are the old style, flat head cap screw, then a replacement adapter hub is no longer available.