Join Date: Mar 2002
Location: Austin, TX, USA
I don't know about big block motors, but on SBC motors there are plugs in the oil galleys behind the cam gear. Also, in the rear main is a port that must be plugged near the oil pump. If you forget to install these plugs in a SBC, you'll get the same problem.
If others confirm similar issues with BBC motors, then pull the motor and ensure all is correct. The cam won't be able to tolerate inadequate lube for very long.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI