My search for a shorty D100 is over
How did the 10.5 power valve work out for you? I just did the same on my Charger, one jet size smaller on the primary and up to a 10.5 power valve, but I haven't had a chance to test it since (long story). I had a bit of a flat spot on tip in in high gear. My car has 2.94 gears, so probably similar to yours in overdrive.