intake manifold bolts weeping

On a 440 cast iron intake manifold, a couple of the bolt heads are weeping oil. The factory parts book is unclear to me if washers should be used under the bolt heads. I plan to put a light coat of Ultra rtv on the threads and reinstall one at a time to avoid a vacuum leak. Should I use hardened steel washers?

Washers wouldn't hurt, I wouldn't use RTV though. I wonder if you have a vacuum leak, what is drawing the oil against gravity ?

Definitely don't want RTV. When you remove the bolts later, little balls of dried stuff can fall into the engine and go where they shouldn't.

I use permatex high-tack to seal them.

The bolt holes are open to the oil inside the head / valve cover area.
I use ACE hardware #4047429 pipe thread compound on the bolt threads.

http://acehardwaremaldives.com/product/plumbing/4047429/#.VyOp6P5MHcs
It is supposed to withstand oil and gas and temperatures to 500 degrees.

Weeping intake bolts mean you're building crankcase pressure.

https://www.pegasusautoracing.com/productselection.asp?Product=3245

Ehrenberg says they should be sealed with nothing but pipe thread sealant. Makes sense.

Ok, I will use pipe thread sealant. Thanks, guys.

agreed, I would check the PCV system and leakdown %

Pipe sealant will take car of it.
Doug