If the burden isn't drastically less then I would feel that a 4G69 for NA or 4G63T for turbo conversion can be General a far better choice Altering valve durations can change the torque band and on most engines the exhaust and intake durations don't really need to match, Despite https://elliotnxck40840.blogunok.com/31620787/the-ultimate-guide-to-4b12-engine-swap