All the major engine manufacturers have rethought oil pressure in recent years. We old rodders are used to stretching relief springs and shimming them to get 80 lbs oil pressure, but the new thinking seems to be that proper volume is more important than high pressure.

30 lbs is probably fine for your flathead, but if you want a little more insurance you might consider one of these high volume Melling pumps. Not cheap, but cheaper than having bearings fail.

http://www.thehotrodcompany.com/shop...&filterkey=oil

Don