You don't have to replace the flywheel because the ring gear is damaged. You can purchase a replacement ring gear from most regular parts stores (Napa, Rock Auto, etc)and have it pressed on by any automotive machine shop. In some cases if the gear isn't damaged too badly it can be turned around and reused. It is a 168 tooth flywheel and was used in cars & trucks for 20+ years. If you do decide to purchase a new flywheel you will also need to match it to the clutch. The clutch could be either 10" or 11". All of this stuff is available in the aftermarket.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine