<VV> The great puzzle

[Robert Paul]

Please put your thinking caps on for this one. I have just had a 110 engine rebuilt ( twice). It burns oil on one side. I know because I set up a dual muffler   It burns oil at high vacume. ( not at full speed). Only at idle. So much so that after you park and let the engine sit for a few minutes there is a pool of oil in the driver side cylinders. Ps. There is a pool of oil under the carb on the driver side.   The Pistons are new from Clarks.  The cylinders are new.  And match on size. We checked that.  The heads have been re done ( twice). What are we missing?  Ps again The crossover tube was disconnected along time ago.  Let's see we specked the Pistons for micro cracks. And ran the engine with a 1/2 cut valve cover to make sure there wasn't flooding I. The driver side.   What have I missed. Any good ideas would be great. Thanks