Low compression "build" and cruise rpm?

There's probably not much reason to go deeper than 3.91, like already suggested a set of 3.55 will probably be more than enough probably turn around 3500 rpm on highway and 3.91 a few hundred rpms more and same with 4.10 and so on.


Here's a low cr 440 build

Dyno testing a stock(?) 1972 440