Working on a 1988 Cat D4c bulldozer, replacing all the blade mounts (weld on).
Video welding blade last time:    • Welding the dozer and backhoe  
Lower mount auction listing: https://www.ebay.com/itm/184905276249
Hardware auction listing: https://www.ebay.com/itm/184905286622
Frame mount auction listing: https://www.ebay.com/itm/184905290357
Levi the dog memorial plates: https://www.ebay.com/itm/184905540733