Valve job on os valves

I've seen @IQ52 (Jim Laroy) make the comment that larger valves make more power everywhere in the RPM range. He oughtta know. lol I think the larger valves are certainly worth it, especially with a slant 6.
Dad said to me, "Jimmy, you gotta be smarter than your oversized valves when you install them too. Done wrong they can easily reduce your flow."

What did he know though?.......

Back in the '70's I saw his engines out pull Richard Petty's engines on the NASCAR straights.

Sigh....We could of used a more experienced driver back then.

Hold it..........What am I doing on the /6 forum?