Technical Sbc 350 oil leak

I have a 1979 sbc 350 I’ve replaced oil sender distributor seal intake manifold gasket and valve covers gasket and still get oil leak top rear runs down to stater sometime both sides rear of motor have oil I’ll attach picture where oil is pooling noted in green after sitting then running down to ground?? Thanks I’m beyond stumped

 

Oil sender plug leaking at the back of the block or crack in the block?


Most times it's leaks at the China wall and the intake .

 

I re-did sender and it’s dry and I did new intake manifold gasket and plenty of rtv on China wall it’s dry too so I’m stumped?

 

Did you put a nice fat bead of black RTV down at the ends of the valley, or did you use the rubber gaskets?

 

I used black rtv not the rubber gaskets for china wall

 

Including the " ears" of the head gasket
between the deck/ china wall & heads..

 

Yes!

 

Has Block or Intake been Milled ?
If so a thicker intake gaskets is needed.
.080 - .160 thou
A good thick beed needed across the China's ..
You said Oil leaks down to starter
Valve covers warped , gasket Not thick Enough & "" If"" valve cover gasket to big with Hang over on inside , Oil will lay & Leak ..

Is plug installed on DS head surface ?
Oil Golly

 

I've seen that plug in the picture above leak...required pulling the head to fix it.

 

Put some engine oil dye in it. Run it a little bit, then use a black light to find the leak.