read up on MBC's. even the installation's should have told you to keep the line as short as possible to not suffer boost spike's. running that long of line isnt the greatest idea, and performance will suffer.
if anything, do a dual stage MBC on a switch. that way you can adjust on the fly to a preset higher setting, but not have the long line, and suffer negative effects that can shorten the life of your turbo quite a bit.