Thanks for taking the time all of you to post what you know. Are the #15 heads original to this car though you said that they were a late replacement does that mean that it is or isn't a 340hp car? i know that the two barrel carb will decrease the hp some, but I plan on going back with a four.I believe that you are correct when you say that it was replaced with a two. The other thing is that it doesn't have dual exhaust that too will make a change. Do I need to get some #47 heads to get the hp up or is the #15 the same just with a different casting for the late run? Also is the YE block a big block or small. I've heard that the 428 and the ram air 400 were the only ones that had the long block is this fact or fiction? I think that it is a long block though it has three freeze plug holes in each side.
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