Maybe you should install an oil filter. Have a look at this link- I’ve written about it in FP but I think it’s worth a repeat. Supply is from a tee fitting on the rear oil gallery plug, the discharge in mine is into the sump via a welded on and drilled slug of metal but I have seen an 11BL where the discharge is at the front and side of the valve cover giving a little extra lubrication to the rocker arms. They can use it, I think.
http://www.frantzoil.com/home.html
Anonymous