First engine build.

If he spends money on valves, he would be wasting his money spending on those titanic 3/8 stem tulip underhead 1.88's , which also have a horrible ski jump off the face of the valve.
If not 2.02, at least go with a +.100 Chevy 1.94 intake valve. Do it once and don't look back.
A good valve is worth some power in the end, and reliablility/longevity.

Ps, the 11/32 stem valve dropped in where a tulip valve was increases the flow 3-4 cfm, skip the heavy stock tulip stuff. Good luck.