need advice on some heads

You know how young guys are.......... I remember back 35 years ago. I had him read an article on one of the racing sites where it said that the smaller valves would do better on the street. I think he paid attention since it was from a racing site instead of me. lol
I had to chuckle when I read this....LOL. Fortunately, my son and I have raced together so he has found that dad is not totally dumb on motors....(well not ALL of the time; I did manage to turn a turbo blow-off valve into a blow-ON valve....but I digress..)