Barry:
I did a lot of looking down the ports with carbs on and off,all looked very clean, no visable
oil. It wasn't until I added UV dye to the
oil that I could see the tracks. I think part of the problem may have been that I used the permatex "ultra gray" sealer around the ports and just noticed after I took the manifold off that the gray sealer is marked " not recommened for parts in contact with gasoline" ! Used T-31 when installing the 4 bbl.
Also it's a single 4 bbl, not 2x4.
Ted
ps: the manifold sinks below the heads, lines up using .090" shims. We used the double BT gaskets initially, but they squeezed out the bottom on the left side because of the port face angle being off (although I checked head and intake angles and every thing was 45 deg.) or the int could be warped slighty, and the seal area around the ports was very small due to the porting done on the manifold before I bought it. I think it would need additional mat'l welded on around the ports and then milled. Does that sound feasible?