This is where my Vaccuum Gauge in the Subaru Gauge Pack comes in. I feather the X, bringing the RPMs to Redline, while keeping the Vaccuum at Max...60 or so. I then rapidly slip the clutch and floor the accelerator at the same time. Plenty of Clutch smell but 1.9s 60 Foot times, N/A.
My clutch hates me but my tranny appreciates it.