I’ve had no issues with either the stock or Nodular 489 case launching at 4500 dead hooking on Drag Radials off the brake at varying weights between 3300 and 3150. 250+ launches off the stock case, while I worked through traction issues to boot. Last weekend it went 6.30 in the 1/8mi with a 1.36 60’. No doubt a Dana or Ferd 9” are tougher, but needed? The data in my book suggests otherwise for a 3300 lb car running 10’s.