Vavle lash

I am getting ready to fire my engine for the first time. what should i set my valve lash at for the first start. the engine will be cold. here are the specs.

383 stock bottom end
comp cams 525 lift 294 duration flat tappet mech. cam
eddy heads with bowl blend and mild pocket port
comp cams magnum roller rockers
stock length cromoly push rods.