What a suprise!

So I drove about 45 minutes away on monday to pick up an edelbrock performer intake for my 318. This intake I purchased from Dartman(Johnny) and it was a great transaction. I went to start the swap and I noticed the intake that was on my 318 looked a little off. Until now I just went with what I was told, that it was just a built 318(no specifics)...
I went and ran the numbers on the intake and it turns out it's a 340 intake. Great! 340 intakes are good but I know that the port size is much bigger than the port size of the 318 heads. Well I now needed to know what the heads were so I would know which intake would be best... So I take off a valve cover and after a little bit of looking around I come across a large "X". With that said my night turned out to be pretty good... :cheers: *score!*