Brent, that was not what Frank had said, he was saying that the motor needed a bigger cam referencing the D cam, not a bigger cam than the D cam, and I agree with Frank that Tunnel motor port should of done better than 513 HP, it had 14 to 1 cr with a single 4, but it was mention that initially the EFI setup they were using was having troubles, could of been limiting factor in performance, and I think if they had tried a carburetor they would of seen an hp improvement, not to mention the 2x4 setup would of been better.
But that's not what the owner of that 427 wanted, he's not looking for every last bit of HP on that motor he had the motor refreshed as it was, could he make more HP with a smaller cam maybe, could he go to a 2x4 setup, could he have those tunnel ports made smaller from even more flow, could he, could he, could he or could he (was that you that had that done to a set of tunnel ports for even better flow numbers, I remember reading about that) Or, does he just want it the way it was back then ?
Can anyone see my point ?
So I want to thank everyone for their help.