Shift light, tach, by ear, rev limiter; what's your choice

318, 904 auto, 7 1/4 w/ 2.76's
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I set my tach under the line of the door so it looks like I have nothing special when someone next to me looks in. When I am just cruising alone and playing; I use the tach to shift because I can look over at it. (exactly at 5500) But I have found when I am really pushing it, I have to go by ear since I can't look down, get off the gas, shift, get back on the gas then look up. (funky transmission does not shift at full tilt.) Then I shift at around 6300-ish. (reckless I know with a mystery built 318, but it pulls until around 6500 so it must be fine)