Jerry (Hotrod Lincoln, I have the engine in a dolly so there's not a gage hooked up. I have capped off the connection that the oil pressure line goes to. I might add that once it shot off (a valve stem cap) and oil shot a good 25 feet before I turned the engine off. That's not to say the pressure is constant.
The cam is the original 261 cam. The lifters are original also (solid lifters).
32vld, Yes sir I just rebuilt the engine. I didn't expect any complications with the oil supply.
Tommy I hear ya brother... I've learned that lesson the hard way already.
My first plan of action tomorrow, will be to pull the distributor and run the oil pump with a drill. I would think the same intermittent problem should occur... right? If it delivers oil constantly I'll suspect the distributor to oil pump connection, though I already checked and the distributor is seated all the way down.
When the flow showed up at the rockers, it was a good flow so I don't suspect any blockage... besides, I had everything cleaned and cleared when I rebuilt the engine (block/head/rocker shafts). When the oil flowed, it did very well.
If I'm left suspecting the distributor to oil pump connection afterwards, I'll put the engine back on the stand and flip it bottom up to try to figure this out. I guess I'd need to do this anyway if I were to replace the oil pump. I need to also verify my new bearings while I'm at it...
I'll post what I find tomorrow evening... sheesh, I had hoped to get the engine back in the truck this holiday weekend.