Double Hump Heads on 350?

[ChopTop]

Since we are on the subject. I used to have some data that listed 186 heads with chambers as large as 68cc. Anyone have anything to support this? I also was under the impression that angle plug heads came factory on some Corvette's. I'm sure at one point in time there were several of these castings available from you local Dealers parts counter, but those day's are long gone. As far as drilling acc. holes in heads, I would be cautious. I have a set of 291's that were drilled, but only after they were built up with weld in that area. There are water ports there and maybe others. If I were to prove the 350 thing I would look at the first Generation Camaro SS350.