454 vs 496 vs 502

[glock7018]

Hey there this will be my first post. I have a project in my head as of now and I cant seem to make up my mind which route i should go for the motor. The project in mind is a K30 crew cab long bed. Truck would be lifted just a little to help clear either 35's or 37's with some trimming, and would be used as a "truck".

Now my main question is what motor should i use? Defiantly want to go BBC , 350-400hp with around 500 ft/lbs of torque. My first reaction is to go with GM Performance HT502 making 340 hp and 512 ft/lbs. But at over $6000 I want to explore my options.

Do you guys think a built 454 or a 496 would be a better, more economical option? Are these motors capable producing mild hp while keeping gobs of torque down low where i need it?

I would be using a SM465 with a ranger overdrive, while running either 4.10's or 4.56's depending on which tire size I go.

Thanks for reading, I'm a total beginner when it comes to gas motors.