Heavy or lightweight flywheel?

What weight is recommended for a 71 Demon, 340 setup. Street use with the occasional trip down the 1/4 mile. I currently use a Ram 28# flywheel but only after a few hundred miles the ring gear came loose. I tried calling them but they're all about emails now and I've been waiting with no response. I decided to put a few welds on it and it's working fine but I'll be driving it easy until I get a new flywheel. I noticed Ram and Mcleod offered lightweight 22# flywheels with a footnote of using heavy flywheels for track use and or heavy car. I know the Demon is a light car. It's a healthy 340 that likes to rev to about 7k. What flywheel should I use?