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.