I'm swapping converters in my Buick and I need to know what tranny fluid is recommended by the builder Nick uses to build his trannys? I'd also like to know why this builder didn't install a billet servo during the build??? I see that it has the dual fed direct with some hardened parts and red clutches. Is a billet servo like the one Richard Clark uses not needed? While I have it out I'd like to address anything more I can do to it. Thanks in advance for any answers to my questions!