Already had the engine builder change out the rear main seal, and the oil pan gasket. I have been having a small leak hit the flywheel and fling it on the starter and the passenger header. I replaced the gaskets and put a nice line of silicone on the valve covers. Checked today and they are not leaking. Also the oil pressure fitting and distributor are not leaking as well. Could it be the plug that I seen on the back of the motor while putting it all back together? Hope not. Its a pain in the a$$ pulling the motor.

Could be the rear intake to block area. That's a typical trouble spot. Take a small mirror up against the firewall and have a look around.

Ditto on the rear intake seal. That's where mine was coming from. Oil on the same spots, passenger header and starter.

John

What about the rear oil gallery plugs?

I hope not, but I guess you gotta check em as well?

alan

Thanks guys. I suspected the mentioned items. It doesn't hurt to get 2nd opinions.

I had a nasty leak which I thought was due to the rear main seal. However as part of changing the seal, oil pan gasket, and new clutch assembly I discovered the rear plug behind the cam was the primary culprit. This surprised me since it was leaking without any pressure behind it. I discovered this leak with the flywheel off and saw a continued oozing of oil from the bottom of this cap. I removed the cap by drilling a small hole and threading in a few threads of a small sheet metal screw. This allowed me the leverage to pop the cap off. A new cap sealed with Indianhead Shellac has sealed this off correctly. It's been a few months and I haven't had a drop of leaking anything in my garage when before I always had a small puddle.
ColoradoZ28

The rear fo the intake looks fine and there is no oil residue. I did notice that the oil pressure line had oil on it wher its connected to the fitting. Is there an alternative besides the cheap plastic line or anything better then that crap? I don't think that the plug in the back is bad. The engine builder did a pressure test when he replaced the bent rod, rear seal, oil pan gaskets, valve cover gaskets, and intake gaskets. This was done maybe about 2 months ago.

The rear fo the intake looks fine and there is no oil residue. I did notice that the oil pressure line had oil on it wher its connected to the fitting. Is there an alternative besides the cheap plastic line or anything better then that crap? I don't think that the plug in the back is bad. The engine builder did a pressure test when he replaced the bent rod, rear seal, oil pan gaskets, valve cover gaskets, and intake gaskets. This was done maybe about 2 months ago.
Go to a truck store, ie peterbilt, freightliner, etc. Ask them for splitter line. Its the 1/8 " line they use on their transmission splitter valve that runs up to the gear shift. This is high quality black nylon line that won't kink or crack. Its also much more heat resistant than that milky white crap you get at the auto parts with your gauge. Its much nicer looking in your engine compartment and interior also...

Even if it's the rear galley plugs you don't have to pull the motor to get to those, just drop the tranny down and tighten them up if they end up being the culprits, much easier than pulling the motor.

Okay, the motor is out of the car and on the stand. It is not the oil galley plugs or the rear freeze plug. Both of those are dry without any residue at all. The culprit was the rear of the intake. I noticed it right way. Going to fix that later on today and wait for my new transmisson. It got stuck in 3rd and blew up last weekend.