For valve springs Tim said seat load ~120 lbs and open load ~300 lbs would be fine. A single coil with dampener was his suggestion for my cam specs. If I would have bumped up to one size bigger cam then a double coil or beehive. Since I'm not running over 6000 rpm he said not to worry about getting the beehives. I'm not sure what my installed height is but compcams springs are rated at ~115 which he said would be okay.
As far as the clearances we did not discuss that. Website says Minimum piston-to-valve clearance is 0.060" intake and 0.100" exhaust. If you had any questions about that I'm sure Tim would help you out.
