at what horsepower do you spend the bucks to change over to the real good input shaft(ringless,300m or? )and add more high gear cluches. i think you upgrade the pump with the input. but at what hp does this need to be done. this is a 2300lb chassis car, with a 900+ hp now without any problems, but he is going to put the big bullit in next year. thanks for any info. lee