360 timing

if my timing says it should be 36-38 degrees at 4000rpm
how do i set that?
years ago i set the timing on a 318 with a timing light but i thought that was at idle.
can't remember. what is the procedure for setting the timing on a 1977 360 to be 36-38 degrees at 4000rpm. it also talks about valve lash .022 int. and .026 exhaust.
i thought these engines had hydraulic lifters and the valves didn't need to be "set".
?? thanks.