Tight lash setting solid flat tappet cam

The big danger would be with too tight exhaust lash. I wouldn't be afraid to try .008 on the intakes, but exhaust i would be carefull. There is some cam and parts flex that changes lash depending on where the lobe is on the base circle. On my race roller with VERY BIG springs with 350 lbs on the seat, the lash swings from a setting of .015 cold to .019+ cold depending on where the lobe is. It is caused by cam flex. Your combo will obviously have a lot less, but it wouldn't hurt to check lash change, and duration change to stay out of trouble. As you get closer to zero lash, the running duration will rise rapidly.