gene here hi

well i got the bigdaddy9x6 because that was my daughters ages when i set up address,, so now the info im seeking is,, i have a 56 belair 2 door hardtop that i need engine and tranny,, ive been doing research and im thinking the way to go is the 6.0L engine, was thinking the 454 but what ive read the 6.0 is the engine to get easy to get alot of horsepower dependable,, where the 454 from what im seeing is a dog, want fuel injection , so is the 6.0 the way to go? and how hard is it to do the computer for a streetrod, thanx any info is appreciated