Thank you for the help.
After a bit of time with a wire wheel, we were able to find the following number cast into the passenger side of the engine, between the distributor and downdraft tube (breather): 3769925
The number cast into the manifold is as follows: 3836850, with the GM 3 below.
We'll have a look, around lunch, for the pipe plugs. Currently there is no filter setup on the engine. There is a mechanical oil pressure sensor installed in that general location.
We'll have a look at the 261 article, as well.
Thanks again for the interest and the help.
Edited to add the "3" to the casting number.
Take Care,
Joshua L. Coder
Last edited by flx261; 06/24/2021 5:53 PM.
