oil

[GET-R-DONE]

oil presher dropt to 20 to 8 in bbc?

[mudslayer2008]

bad oil pump or faulty  gauge

[Bowtie972]

What weight oil are ya runnin?............I run  20W-50 after mine warms up it will drop tp 15-20 psi.  I had the same thing on my old BBC too.

[Ranger Dave]

cam bearing,  rod bearing,  main bearing,   crank wear.  many of things.  change the  oil,  maybe  run  some  20 - 50   in it.  and see what  happens

[STEUERDUKES]

For the price of an oil pump compared to other engine parts, Id get a new pump.  I ran a Moroso pump in my 427 and had awsome oil pressure. It would peg a 80psi gauge on start up and come down to about 30-35psi after warmed up at idel, between 40-60psi driving it. I also used 20-50 and kept fresh oil in it.

[Bo Duke]

But if its not the pump, like RD said Bearings could be going out, and putting a new pump isnt gunna make those bearings any better..