i ran a ECSB 5.3/60E w a TSP228 an it was slow out the hole with a 3400/3:73s but 70+ was mean as hell!
i have a stock motor 5.3/60E CCSB with 3:42s an a 3200 stall.
my 6.2 is getting a cam like that so i really dont think you should run it in a DD 5.3, but i dont know anything, so good luck.