From that description, I take it that this will not be a daily driver, or even a seldom driver? Unless it will be at the strip every weekend, I would put that $$$ into the truck rather than the motor. That is a lot of exotic parts for a first time builder. 10:1 or 11:1 compression, combined with roller valve train and aluminum heads are just overkill for street use, although polished aluminum heads look awesome!
It doesn't take much to make a 400 SBC a stump puller, they have that going for them in stock clothing. But add mild head porting & polishing, a good hydraulic cam, good intake and carb, good ignition, and
MATCH all the parts to work together, and you will have a kick-ass street motor! Just don't forget to use heads that have steam holes to match the ones in the 400's deck!!
It's funner to have something that you can hop into, start it up, and blow the tires off of it anytime you want rather than one you have to constantly adjust the valves, tweek the carb, check the .......... you get my point.
Do what ya want to, but after building engines from mild to wild for over 15 years, this is just my own opinion
