500 vs 512 from 400ci

I was wondering about the stability of them myself.. but figured most of our "street" builds get very little miles, but i also make horrible decisions.. so that's probably a good call :)
You are right about the miles put, its not like a daily home work home deal in most cases, but I work from home and I drive my kids and even get groceries with my car when weather allows it. I like driving this car so much that I take every excouse to do it. That said if I can make it live a bit longer with right parts choice I will.
My max power goal here is also something that will happen not often. Advantage of nitrous build is that you tune NA and do most of the miles like that. Nitrous happen ocasionally.
I guess I probably do like 2500-3500 miles a season.