overlap will depend on your static comp ratio.
no point in having huge overlap unless you have 11:1 comp or something crazy.
its all about matching everything to where you want the power to be made.
either way
lots of lift is good on these motors
btw lots is a relative term.
unless someone with more money than I can develop an aftermarket head for rbs with raised ports larger cam journals that are raised and bigger diameter lifters.
so we can see what .600+ thou lift does