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i'm just trying to help. did you ever check the housing bores for size and roundness? frankly, most home builders don't because they don't have the proper tools or experience to do it. 65 psi cold is a smidgen low on a cold motor, but not what i would be concerned about. what was the pressure hot at 6000 rpm? that's way more important in my book.
i'm just saying, IMO you should do the oiling mods. it's not voodoo, it helps. the basic mods are fine although i still prefer the 1/2" oil pickup.
are you running a std or high volume oil pump?

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I know you are trying to help. It's hard to show feelings with a key board. I appreciate all of the replies so far, really!
I did not check bore size because of the reason you mentioned. 65 psi was cold idle. At 2200 rpm it was at 75 rpm. I didn't take it up higher than 3500 and it remained at 75. When I raced it with the engine at temp. my oil pressure sets, or sat at, 75-80 psi at 6500 rpm.
With that, what mod would you recommend? I'm leaning toward the one that blocks the oil from #4 to the cam bearing and drill and tap in a restrictor into the main oil galleies for rocker lubrication. If any mods, to me, this one as described in the "Power Adder" section, would work best on a street/strip engine like mine.

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Considering the preference for high viscosity oil/additive, that stp adds a whole bunch of viscosity....but if you like it, go ahead and use it....I also think it's a good candiate for the old direct connection "hemi" 1/2" oil pickup, radius and blend the pickup passage modification. SAE 50 and 40 weight were commonly used back when the books detailing those mods came out.

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