If you run the SE intake it will have to be modified to fit unless you're using 120r cylinders. The valve springs were done by the builder, not sure why he swapped them, it was mentioned they were at the spring pressure he desired for the T-Man .725's. As far as flow #'s I eluded to that in my previous post. The builder was impressed with the intake flow, and not so much with the exhaust side. I'm not an engine buider/ head porter, I just like Hot Rod street cars, and to me a Harley is like a American Muscle car on two wheels. Give Riverside a call and he can give you the pro and con on the Hurricanes and flow #'s, since he's got first hand experience with them, not to mention 3 or 4 decades racing, and building HD's.C-Cat,
No 120 for me. Going larger. Noticed you mentioned swapping valve springs. What was your thinking on that if I might inquire. Do you have your flow numbers after your heads were cut?