Thanks to BLKFIN and all the others who responded - and especially Rob (Needswings) for taking my inquiries the way they were intended. I did get (very politley, I might add) educated on several points. I missed the part where the opening is larger, due to the piece being removed. AND did not take into account how size and routing might affect other mods. That is a big one! I still have not decided which way to go. The SL55 sounds good, but I want to hear more about Rob's new setup. And the intake manifolds.
Can't thank you guys enough for the civil exchange of ideas, and sharing what you've learned with me. I've had less pleasant experiences trying this on other forums. Looking forward to learning lots about my SRT6 from you all.