71 Duster Dyno

Might be hard with the manual though
Practice practice practice !!!!!
Lightning quick foot pump, balls out quick slamming the shift stick foward quickly and more practice!
Learn where the pedal is and how far you need to go to disengage the clutch and then! Remove your foot to the left to in gauge the clutch. Let that pedal slam up a micro fraction of a moment before the trans teeth crash and crunch together.
This takes time and practice! Go slow and then build speed.

There was a time, long long ago, people would ask me what shift kit I was running. So I'd tell'em, the shift kit is call a "Left foot express." And left it at that, Pointing at the clutch pedal.

Just wondering if you were using 25% as a hypothetical and/or ease of number calculations? I've always heard a safe bet for automatics is 15-20%.... but I'm no expert. Just wondering if the thinking on that has changed?

A super over est. I do not know how much power the 833 manual consumes. Automatics consume what you wrote. A lot depends on the specific transmission. According to other members here, there is a huge difference between the 727 & the 904, which is kind of evident due to the switch made many years ago by the pro's in the sport of drag racing by the well known tune of a tenth in the 1/4 or better.