How hard can i rev?

IMO, those pistons are too heavy to be spun to 7K reliably on a stock crank and rods. Raise the gearing to 3.91s or 4.10s, get a convertor that is a little more loose (11" will really nail the tires HARD) like a 3500 9", and run some 28" slicks, and if it doesnt run mid 10s, you have issues. I'd look to be trapping in the 6400 range. Good cam and head choices too. just need the "rest of the package". With it all sorted, I'd think low 10s is attainable in good air.