Thanks Another reason why I think it could be a vacuum leak is I used the cork gasket on the front and rear of the block I should have tossed them out and just use a good sealant
Are your outboard throttle plates closing completely? Heavy wear in the bores or shafts? Warped or cracked base plate? Power brakes?
If your manifold is not sealing internally I'd think you'd be burning oil.
External leaks might be found using this method with extreme caution and extinguisher at hand.............