If you have all the parts I would install everything and have your cylinder heads CNC ported there will be benefits from it. I have seen the JWT C2 camshafts make really good mid range and top end power. I wouldn’t really worry about losing a lot of low end torque since the JWT C2 camshafts will really shine in other areas of the power band. You should do this now that way you will not have to do it later on.
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