Technical 346 Cadillac Flathead Clutch Kit Question

Hello Caddy Flathead spe******t!
After I run my Ford Pickup with the Caddy Flathead any 1/8 mile races, the clutch is slipping.
This year I spend a Clay Smith Race Cam in the engine and the 430 Nm torque are maybe to much.
I will change the clutch and hope to find a stronger kit like the standard.
Has anybody experience with it or a tip which clutch can bring more performance?
The gear box is a 37` Caddy/Lasalle 3-Speed floor shift.
Thanks Dirk

 

Have it rebuilt and add stronger springs...

 

Thanks for this! Are there mor info about the springs? From what are the stronger springs? Any part number?