Torqueflite 904 450HP please help me !!

Michel said
to use multi spring kit is required substuir drum and piston ??

http://www.tcsproducts.com/products/product/a904-front-drum-24-spring-return-module/

http://www.tcsproducts.com/products/product/a904-aluminum-front-drum-piston-kit/

Not sure what "substuir" means. If it's the aluminum drum kit in your second link then the answer is no, it's not required. The 24 spring kit will work in a stock drum